I'd love to find some authoritative papers on the subject but this is based on 40 years of experience with the subject of computing and RSI, and I have never had any reason to question it because it works for me and was the best advice I ever got from a physiotherapist: change your keyboard often and you'll avoid RSI.
It works, that's all I can say about it. RSI problems go away whenever I switch keyboard/mouse setups.