I've never understood the draw to this. I can type really quickly and I don't understand how curvature impacts typing performance. I thought that touch typist

I've never understood the draw to this. I can type really quickly and I don't understand how curvature impacts typing performance. I thought that touch typists rely on muscle memory for spacing rather than the feel of the keys. Normally I use a Model M, but when I switch to my MBA, I don't really have any issues.