That's usually a good clue that you've hit real middle-ground.
I blackify my projects once we hit 3 contributors.
I write some garbage-formatted code, press ctrl-s, and the code is formatted automatically.
Even on a single-dev project, I would take a config and just put it there for the convenience it provides me.
If I ever were to code python again, I would probably also use black.
That's usually a good clue that you've hit real middle-ground.
I blackify my projects once we hit 3 contributors.