(This is just my personal experience. 30 years ago I was diagnosed with carpal tunnel, and I change my keyboard every 6 months. Never had it since!)
>The best thing to do to deal with carpal tunnel is to change your keyboard out every few months.
N=1. Expensive solution. More likely alternative explanations.
Sometimes the simplest solution is the best one.
Yeah. Which is exactly why if the benefit is being aware of your hand posture you're better off just sticking a note on your keyboard than buying a new one every few months.
That was my whole point!
Besides, keyboards are cheap... cheaper than therapy and drugs and all the other hassle. This really is the simplest, cheapest solution. And no, I don't buy the 'woo woo hand wavy' aspect you imply - I believe that having different geometry to deal with, keeps my hands from becoming accustomed to the repetition of previous keyboards, and thus it exercises my hands in a different way - and it is the difference that matters, above all else, to keeping RSI away ..
Except a sticky note.
Was the approach of changing your keyboard periodically recommended by a medical professional? Or by something you read?