Coding in DOS, saving before executing your program became a reflex because any hard freeze in your program would force you to reset the machine. It wasn't rare

Coding in DOS, saving before executing your program became a reflex because any hard freeze in your program would force you to reset the machine. It wasn't rare, and practically unavoidable if you're trying to do something clever like a TSR. Or doing something interesting with graphics - if you got left in a weird mode, you might have to type blind to recover, or give up and reset.