Idk, anything that does what a keyboard does for gaming will basically just end up being a keyboard honestly. If you want a set of easily accessible, customizable buttons for a videogame, what better than just a whole board filled with them really. I think that KBM has stuck around so long is that it is just a great way to play a lot of games.
My main point is just that I don’t think a lot of people are “tolerating” keyboard controls like you initially said.
It works surprisingly well, most 2D fighting games are just doing 8 directional movement anyway, so it can make a lot of inputs easier actually