Those aren't highly opionated default formatters though. The JavaScript community seems to have settled on Prettier as the go-to formatter, but not everyone use

Those aren't highly opionated default formatters though. The JavaScript community seems to have settled on Prettier as the go-to formatter, but not everyone uses it, and even Prettier had to add a bunch of options for certain things that will always be highly personal. Stuff like trailing commas, tabs vs spaces (and how many spaces‽), line lengths, and semicolons.