Is anyone really reviewing code anymore though? It sounds like you are, but where I work its pretty much just scan the PR as a symbolic gesture and then hit approve. There's too much to review, to frequently.
I'm in a large enterprise context--you have to use human reviewers if you don't want to end up like Github's status page. So much context exists outside of the code that the bots are either not provided or are far too large of contexts for current windows.