Re: per-user ignores:

> For example, if you’re on macOS, adding .DS_Store here would be ideal.

As long as every Mac user on your project does. If you have more than one, it may be better off taken out of everyone's hands.

That's a very particular way to frame the few vs the many. If a single macOS user works on ten different projects, should all ten projects add that line, or may things be better off taken out of each project's hands and on that single user?