I’m not convinced that anyone types that much that an extra few millimeters of finger movement amount to much of anything.

If people want to mess around with such extreme keyboards as a hobby, then have at it! But I’m rather hard pressed to believe in this day and age - especially since almost everything has a GUI - that people are typing sooooo much that an extra row of numbers or other keys and moving your finger that tiny distance means anything. I’ve replied to someone else stating that I used to work for a large high end furniture company which had tons and tons of studies on ergonomics and such in office environments. No one is going to convince me these ultra minimal keyboards are for ergonomics or speed. They’re for tinkering around, having something that others say “oh, that’s different” and a way to pass the time. Which is fine.