> Our entire small team thumbs up a PR before it's merged unless there's a big rush on it

This has been tried by a couple of my past managers.

This feels great with a small team on a slow moving codebase. If you try to force it on a larger team or expect the codebase to move quickly then it turns into a performative game of skimming the code (if that) to click the thumbs up button so you can get back to your work.

The end game was a situation where nobody was really reviewing code because everyone had their own work to do and they didn’t want to be the one person blocking important PRs, so everyone was clicking thumbs up.