I haven’t used this project but I have used Gerrit. It has its drawbacks (like terrible UX) but its style of code reviews were the most sensible and commit of every PR might not be as bad as it sounds. GitHub’s PR reviews are atrocious and it’s unfortunate they have become the gold standard.

In Gerrit, you commit every review, and the author has to edit individual commits to address them (using git rebase). This may sound PITA but it makes the history absolutely clean, and makes it easier for both reviewers and authors to review and address suggestions.

On Github, on the other hand, reviewing a large PR is just insanely hard. Making sure comment was addressed properly is hard as well, they can get lost in a sea of suggestions. They also become separate commits instead of being part of the commit itself. The commit should always been treated as unit of work rather than the branch.