Why would it cause extra effort? Not having automatic formatting causes extra effort because you have to tell people to fix their formatting!
> It has never happened to me to upgrade black and have it not change opinion about black formatted code.
I'm sure small things change but large differences? No way. Even the differences between YAPF and Black aren't that big in most cases.
> It doesn't matter how minor they are. A 1 bit difference is still going to fail my CI.
Right but you have a pre-push hook to format the code using the same version of Black as is used in CI. Then CI won't ever fail.
> I can't cherry pick bug fixes from one branch to the other, because black fails my CI.
Cherry pick, then run Black. Sounds like you have a very awkward workflow to be honest.
