I hate the tiny key travel, flat keycaps, removal of pgup/down/ins/del, and putting the function keys as secondary functions of media keys I never use.

> We have no mechanical challenges now, but still using misaligned, less usable keyboards, why?

Inertia. And I have trouble finding an intuitive reason why an aligned grid would make typing easier; just sounds like something slightly different for my muscle memory to adjust to. I can imagine something like the combination of aligned keys spread into a slight arc shape being nicer, just because of the angles involved.