Back in the mid '80s our school was given a small number of Microwriter chorded keyboards (https://en.wikipedia.org/wiki/Microwriter) for our BBC Micro lab. Even as 12 year olds we were already crazy good touch-typists, so the Microwriter felt very clunky and unintuitive to us. I don't know what the lesson is from that. Just because it seems a good idea doesn't mean that it is. Or typewriter-style keyboards have survived over a century and a half for a reason.