RubyMine can become a resource hog - even when it's not acting up the VSCode responsiveness is a noticeable improvement for me (and I'm working on a i9 MBP with 32gb ram !) - for example code refreshes analysis hints and opens autocomplete much faster.

I don't trust any refactoring tool to do cross file refactoring correctly in JS/TypeScript and the code navigation stuff in VSCode has been rock solid for me - I don't really miss anything and it's a much faster environment to work in - if I just had to do JS/TS development I could switch without any issues.