AI code review is nice to have an additional pair of eyes but it doesn't substitute to the maintainer eyes. A big part of a review is deciding if you want that change merged in. Not because of the immediate code but what it means to the project to bring this in.
AI code review, to my eyes, just reduce the number of bugs, they do not shorten the review time. Otherwise, it means you are compromising on the direction of the project.
I meant AI to judge whether a PR is trash or not for ban purposes. Not AI to do the thorough code review itself.