Why Spring Boot 3’s Move to Java 17 Changes the Game for Backend Engineers

Java 8 has long been a pain point for the Java community, symbolizing the tug‑of‑war between stability‑focused management and change‑driven developers.

Many companies have quietly chosen to avoid new Java versions, but Spring Boot, the dominant Java framework, now requires at least the latest LTS release, Java 17.

For those still clinging to Java 8, it’s time to wake up.

What Should You Do?

Upgrading without a real need is pointless; only genuine requirements justify a version change. Two scenarios make an upgrade meaningful: when intense competition forces you to add version upgrades to your task list, or when you fall far behind the community and feel compelled to catch up.

What Has Changed in Spring Boot 3?

Spring Boot 3 tightly integrates Java 17, adopts the brand‑new Spring 6, upgrades Maven support to 3.5, Gradle to 7.3, and switches the default version manager to Grandle.

Although Java EE usage is declining, many large enterprises still rely on it. With Jakarta EE 9, package names like

javax

have been renamed, and Spring Boot 3 aligns with Jakarta EE 9 to stay current.

For most developers, Jakarta EE now has little impact, and unless you have a specific need, it’s advisable to avoid it.

Removed Components

Spring Boot 3 drops several outdated dependencies, such as Apache ActiveMQ, Atomikos, EhCache 2, and Hazelcast 3, which are no longer recommended for new projects.

EhCache 3

H2’s web console

Hibernate’s metrics

Infinispan

Jolokia

Pooled JMS

REST Assured

These removals reflect a shift away from legacy, commercial‑heavy libraries.

Should You Be Worried?

Spring Boot 3 is currently in its M1 milestone, with a new M2 release expected on March 24. While frequent updates can feel unstable, staying on an old version also risks future forced upgrades.

Maintaining a clean system is a good habit; even when the framework offers many extensions, use them judiciously to avoid technical debt.

Ultimately, a developer’s career should focus on personal growth rather than catering to broader class concerns, unless they directly affect your work.