[vocram]

You want a switch that also kills power without software or firmware.

I had a Dell that once got stuck and the usual long press of the power button was not switching it off (probably it was sw/fw controlled). I had to take it apart and disconnect the battery, otherwise I would have lost my working day waiting for it to die.

[polygloty]

Just like a sibling comment says I also haven't ever seen a case where a long press didn't turn a laptop off but i agree maybe a pin push button for hard restart might make sense in such cases.