[meowface]

I've settled on "follow the existing/upstream project's style; if it's a new project, follow the language's idiomatic style". I personally (strongly) prefer spaces over tabs, but I've inherited/forked plenty of projects that use tabs in JavaScript for example, and I just set my editor and formatter to use tabs in that project.

I think the ideal situation is a language with an official or at least commonly accepted formatter, so that existing and new projects will essentially always follow the same style and you never have to think about it. Like "go fmt" always using tabs. I don't like tabs, but I like that kind of enforced consistency way more than I dislike tabs.

That's also why I like using opinionated third-party formatters like prettier and black. Combined with pre-commit hooks, you almost never have to think about style and can just focus on the code. Plus diffs are cleaner.