Yeah, Ruby wasn’t unpleasant to write in the wonderfully simple TextMate back in the day… a full fat IDE feels like extreme overkill.
I might even say that’s a point of attraction for the language. Overwrought IDEs and heavy editors are more optional relative to some languages.
I have worked at several ruby shops and everyone has used heavy IDEs like RubyMine and VSCode, jump to's and language server are far too important.
Dunno, if you're using Rails, because of the naming conventions its pretty easy to find what you're looking for by just jumping to a file using grep or something.
Ruby-lsp runs everywhere nowadays, but back in the day, there was all sorts of code completion servers, live coding environments, etc... for Emacs, Vim had completion servers, and if you didn't have any of those, the REPL has always been good too.