Eclipse already did (integrate JVM LSP support). It kinda sucks still in lots of ways, but at the same time, it is pretty surprising how well it works and is to

Eclipse already did (integrate JVM LSP support). It kinda sucks still in lots of ways, but at the same time, it is pretty surprising how well it works and is totally usable, eg: for working on React. If more work is done on it then it's definitely going to start change things a bit (in part also because Eclipse itself has improved dramatically in the last few years).