Not OP either, for me due to RSI I've switched to use a touchscreen when I can, and alternate the mouse between left/right when I have to use one (Ergo mouse and similar never seemed to do anything for me). As well as a super light/smooth keyswitch keyboard (Fujitsu Libertouch with cut domes).

That might work for some ppl but in my case my fingertips were a problem too.

Light keyswitch keyboards do help, yes. Microsoft Ergonomic Keyboard in my favourite but these things are very individual.

Even though I am a linux guy, I use the Microsoft Ergonomic Keyboard (NOT the more recent Surface one, it's horrible).

Also a Linux guy and have gone through 3x Sculpts over the years. They are pretty great for their price.

Not OP, but I had a boss who specifically bought ambidextrous mice and would switch hands every hour (or so).