The Apollo guidance computer specifically had a pretty unusual definition of "crashing" too. What it would do is save all the critical data, turn everything off

The Apollo guidance computer specifically had a pretty unusual definition of "crashing" too. What it would do is save all the critical data, turn everything off, reinitialize the hardware, and restart all the jobs from designated reentry points. Very unlike what we think of as crashing. Regardless, a modern boot chain is much more complicated than anything the Apollo computers had to deal with, where rebooting (as opposed to the safe restart procedure above) simply involved setting the program counter to some default value.