IIRC, other computers such as the Apple II had a single 'Reset' key. It was not uncommon (for me) to be typing in my code from a magazine, reach up to hit backspace (delete) and accidently reset the computer. :(

There were a few iterations that depressed the key, etc.

Overall, I liked the three finger combination because you had to mean to do it.

I will say that using it to login/lock windows instead of rebooting was not intuitive at all.