This is going to be controversial, but what saved me was abandoning a keyboard-intense environment (emacs + command line) for Apple’s Xcode. I do still build much of the time at the command line, but editing code and switching between windows is mouse-heavy.(You can use Xcode as just a text editor if you like.) I cut and paste by selecting with the mouse where possible. I have a gaming mouse with a button programmed for macOS’s “Exposé” so I can find windows back – and I use a single screen, a 27″ iMac.

I have an Apple trackpad which I use to give my hand a break from the mouse, but I find that if I use it heavily for a day or two I get sore fingers. I use a mechanical keyboard. That too tends to cut up my fingers, and I’m on the lookout for a better one, or at least better keycaps.

I’ve been doing this for 45 years now, since age 19. Along the way I’ve used punchcards, line mode editors, TECO itself and two TECO-inspired full screen editors, various full-screen editors like DEC’s EDT, and emacs. I know vi, and will by habit drop into it when editing config files and so on, but don’t subscribe to the view that it solves the RSI problem. So I do know how to edit efficiently using keyboard shortcuts, but now think it’s the wrong thing to do.

I went through a stage where I used emacs and a Happy Hacking Keyboard, and was very sore at the end of it.

I am not slow with my mouse. I can churn out ~2000 lines of good C++ in a day. (But I am not a fan of the language from a typing point of view!)