Yeah; I’ve a trackball mouse with an unhelpful button layout. XInput gives me the power to change the button assignment (and indeed, speed if I wanted) for input devices on a manufacturer / model-number basis. The amount of flexibility it provides seems ridiculously over-done, until you actually have a use for it.

Wayland developers seem to have thrown out all the ‘cruft’ when they’ve started over, but not realised that a lot of cruft (even basics like on-screen keyboards, screen readers) is superfluous to many but completely essential for a few.