Can we agree that f your goals are "don't get replaced, but help the company grow" it's a risk-reward tradeoff to do things like documentation? And sometimes documenting won't help growth at all, and sometimes it won't affect how replaceable you are?

My point wasn't meant to be a generalized "documentation NEVER helps", just that it's entirely possible for an action to be primarily a risk-of-being-replaced without much personal gain :)