That's pretty neat, but I think I'll stick to my Mac with RubyMine. I'm just getting too old and set in my ways I guess.

Not at all! I think that we find what works best for us. Back in the day, I couldn't afford an Apple device so I was developing on an old Intel Core i7 2700k. This was back before Docker was even a thing and WSL didn't exist. Even once Docker did come out, Ruby support didn't exist for a while. I used a VirtualBox to run Ubuntu and created network shares (super slow) to do all of my development within. Life finally afforded me an Apple computer and I used those for a long time until more recently where I've been giving Linux an honest go as a development environment.

Still on Ubuntu but getting used to Omarchy. With Neovim just can't get debugging working! Any ideas?

Sorry Simon, I don't use Neovim so my understanding of its debugger tools is very limited.