{"id":3510,"date":"2025-10-08T01:00:51","date_gmt":"2025-10-08T04:00:51","guid":{"rendered":"https:\/\/nextage.com.br\/blog\/?p=3510"},"modified":"2026-03-11T10:38:28","modified_gmt":"2026-03-11T13:38:28","slug":"which-javascript-python-and-java-frameworks-to-update-in-2025","status":"publish","type":"post","link":"https:\/\/nextage.com.br\/blog\/en\/which-javascript-python-and-java-frameworks-to-update-in-2025\/","title":{"rendered":"Which JavaScript, Python, and Java frameworks to update in 2025"},"content":{"rendered":"

That system that’s been running for three years on an old version of React. The Django 2.2 API that “works perfectly, no need to touch it.” The Java backend that nobody wants to touch because “it’s stable like this.”\u00a0<\/span><\/p>\n

If this reality sounds familiar, you’re not alone. The question is: does postponing framework updates solve anything? The short answer is no. The long one involves security vulnerabilities, demotivated teams, and costs that only increase.<\/span><\/p>\n

According to the study “<\/span>Breaking technical debt’s vicious cycle to modernize your business<\/span><\/a>” by McKinsey, based on the analysis of over 200 projects, technical debt costs an average of $306,000 per year for every million lines of code, equivalent to 5,500 wasted development hours. Outdated frameworks are one of the main sources of this problem.<\/span><\/p>\n

Let’s get straight to what matters: what needs attention in 2025? NextAge answers that in this article.<\/span><\/p>\n

Why does 2025 demand special attention?<\/b><\/h2>\n

\"Hand<\/p>\n

This year concentrates the end of support for important versions across various technologies. When a version reaches EOL (End of Life), it simply stops receiving security patches. No fixes, no updates, no guarantees. OWASP (Open Web Application Security Project) lists “Vulnerable and Outdated Components” as category A06 in its Top 10 security risks, highlighting that this is one of the most exploited vulnerabilities currently.<\/span><\/p>\n

Additionally, the developer market has changed. Qualified professionals want to work with current technologies. Keeping systems on old versions can make it difficult to attract and retain talent. Still, according to the same McKinsey research cited earlier, CIOs estimate that technical debt represents 20% to 40% of the value of all company technology assets, and obsolete frameworks are at the center of this number.<\/span><\/p>\n

What we can take from this is that postponing updates doesn’t reduce the work. It only makes it more complex and expensive.<\/span><\/p>\n

JavaScript: what’s asking for an update<\/b><\/h2>\n

React<\/b><\/h3>\n

The React<\/a> ecosystem has gone through significant changes in recent years. If you’re still on versions 16 or 17, there are important features being wasted. Version 18 brought considerable performance improvements, especially with Concurrent Rendering and Automatic Batching.<\/span><\/p>\n

The biggest challenge is usually migrating from class components to hooks, although it’s not mandatory. Large projects can do this gradually, prioritizing critical components.<\/span><\/p>\n

Angular<\/b><\/h3>\n

Angular has an accelerated EOL cycle. Each major version receives support for approximately 18 months. If you’re on Angular 12 or earlier, you’ve been without support for quite some time. Version 17, recently released, has already brought changes to how signals work.<\/span><\/p>\n

The good news is that Angular CLI facilitates incremental migrations. The bad news is that skipping multiple versions at once increases complexity exponentially.<\/span><\/p>\n

Vue.js<\/b><\/h3>\n

Vue 2 officially reached ends of support in late 2023. Applications still running on this version are operating without a safety net. Vue 3 isn’t just an update, it’s a rewrite that improves performance and offers Composition API as standard.<\/span><\/p>\n

Migration can be gradual using tools like vue\/compat, which allows running Vue 2 code within a Vue 3 project.<\/span><\/p>\n

Node.js<\/b><\/h3>\n

Node.js LTS (Long Term Support) versions have a well-defined lifecycle. Node.js 16 ended support in September 2023. Node.js 18, which is LTS until April 2025, needs to be on your radar if you haven’t updated yet.<\/span><\/p>\n

Version 20 is already in LTS and 22 recently entered this phase. Beyond security fixes, the most recent versions bring significant performance improvements and support for modern JavaScript features.<\/span><\/p>\n

\"Close-up<\/p>\n

Python: the ecosystem that doesn’t stop<\/b><\/h2>\n

Django<\/b><\/h3>\n

Django has a clear support policy. Old versions like 2.2 have already ended their cycle some time ago. If you’re on Django 3.x, it’s worth checking the specific EOL dates for your version. Django 4.x brought async views natively, which can positively impact the performance of applications with high concurrency.<\/span><\/p>\n

Breaking changes between major versions are generally well documented, making migration planning easier.<\/span><\/p>\n

Flask<\/b><\/h3>\n

Flask is more conservative with changes, which can give a false sense of security. Flask dependencies, mainly Werkzeug and Jinja2, also have their own update cycles. Keeping everything aligned is important to ensure stability and security.<\/span><\/p>\n

FastAPI<\/b><\/h3>\n

FastAPI grew rapidly and became a reference for modern APIs in Python. If you’re on older frameworks and need performance for APIs, considering a migration might make sense. The learning curve is relatively smooth, especially for those already familiar with Python type hints.<\/span><\/p>\n

Python\u00a0<\/b><\/h3>\n

Python<\/a> 3.7 and 3.8 are already without official support. Running applications on these versions means not having access to security patches. Python 3.11 and 3.12 brought significant speed improvements, in some cases, gains of 10-60% compared to previous versions.<\/span><\/p>\n

Migration between minor versions of Python 3.x is usually smooth, especially if you maintain good code practices.<\/span><\/p>\n

Java: what can’t be left behind in companies<\/b><\/h2>\n

Spring Boot<\/b><\/h3>\n

Spring Boot has a release cadence that demands attention. Old versions may have extended support through commercial contracts, however the community version has shorter deadlines. Spring Boot 2.x is heading toward the end of support, with version 3.x already established in the market.<\/span><\/p>\n

Migration to Spring Boot 3 may require adjustments related to Java 17 as minimum baseline and changes in the Jakarta EE namespace (formerly Java EE).<\/span><\/p>\n

Java (JDK)<\/b><\/h3>\n

Java LTS versions are 11, 17, and 21. If you’re running Java 8 in production, and many companies still are, know that free public support ended years ago.<\/span><\/p>\n

Jumping directly to Java 21 might seem tempting, however depending on the application size, taking intermediate steps (11 \u2192 17 \u2192 21) might be safer and more manageable.<\/span><\/p>\n

Modern alternatives<\/b><\/h3>\n

Quarkus and Micronaut emerged as alternatives to Spring, especially for microservices and cloud-native architectures. They’re not direct replacements, however they’re worth knowing about if you’re planning larger refactorings or starting new projects.<\/span><\/p>\n

How to prioritize what to update first<\/b><\/h2>\n

Not everything needs to be updated at the same time. A good strategy involves evaluating:<\/span><\/p>\n