I don't think modern Java is a 'move fast ~and break things~' environment. It's a comparatively stable platform with an enviable focus on backwards compatibility. The maintainers have talked about "last mover's advantage" when it comes to introducing new language features. Java has a checkered history when it comes to novel programming language features, so I think this is good.

Granted, the maintainers are more inclined to deprecate and remove parts of the API than has historically been the case but it is mostly obsolete things like applets. And you may need to keep a close eye on runtime flags and their effects.