Yep, I'm using JBoss as a catch-all for older "big-iron" style Application Servers - modern Jakarta EE (10 onwards) is much more slimmed down, and a solid option.
unsure re Maven, 4.0.0 has been around the corner for years, but I think there is space for a modern alternative that is JPMS first, supports semantic versioning (i.e. tilde/carat notation) with lockfiles, and doesn't require a bunch of plugins out of the box for common use-cases. Maybe Mill (https://mill-build.org) - i've yet to try it.
unsure re Maven, 4.0.0 has been around the corner for years, but I think there is space for a modern alternative that is JPMS first, supports semantic versioning (i.e. tilde/carat notation) with lockfiles, and doesn't require a bunch of plugins out of the box for common use-cases. Maybe Mill (https://mill-build.org) - i've yet to try it.