I was speaking in more general terms, but I'll provide some examples. I grip my mouse to use its side buttons to navigate forward/backward in a web browser. H

I was speaking in more general terms, but I'll provide some examples. I grip my mouse to use its side buttons to navigate forward/backward in a web browser. Human hands are generally good at holding things, and flat touchscreens/trackpads aren't very holdable. Power tools, steering wheels, gear shifts, volume knobs -- all examples of things that are gripped.