The next version of upstream Eclipse (2022-09) allows projects to use Java 17 as the base Java runtime environment. So some projects JBoss Tools depends on already made the switch.
As a consequence, next JBoss Tools will also require Java 17 as the minimum Java environment to run.
So JBoss Tools projects are from now allowed to switch to Java 17 and use the nice features from this release.
In the coming days, the main jobs for JBoss Tools will be switched to use Java 17.