I'm happy with this.

I thought these rules had been removed from eslint proper? I guess this repo is very behind on linting versions?

Hmm? It's a thing? https://eslint.org/docs/latest/rules/curly

I thought these rules had been removed from eslint

curly is not part of the stylistics rules which were migrated to another team.

https://eslint.style/rules

Interesting choice to only get rid of some style rules...

Personally I think doing prettier or dprint would be better solutions, but, it's all the same

ref:
https://www.joshuakgoldberg.com/blog/the-blurry-line-between-formatting-and-style/

We do use prettier already, except it didn't say anything here.

We could add the plugin:
https://github.com/JoshuaKGoldberg/prettier-plugin-curly

If we used prettier only, yeah. Not much point if we have eslint IMO.