Bus factor and deployment safety.

It takes time for the rest of your team to stay up to date on what you are doing, and you don't want to release too many changes at once, so it's faster to pinpoint which one has an error

Because I’m working with a designer, who is working part-time, and have to wait for his renderings. He gets pissed off, if I guess. I don’t want to have to undo a bunch of work, if I guessed wrong.