[freedomben]

Very long time vim/neovim user here. I can't remember names atm and can't check, but I have definitely seen plugins that run a headless or subset of VScode in the background to pull info from it. It may not be super common, but it is being done

[devsda]

You are probably referring to language support plug-ins.

IIRC, debugger support for java needed a component from one of the official plug-ins.