I’d settle for them making PRs as useful as they were in 2015, before they messed up some of the most basic functionality: showing the diff, and showing review comments. They hide big diffs behind a “load more” link, and as a result people often fail to code review the most substantial part of a change because they scan right past it, thinking it’s a removed file or binary or something. Then, once you submit a review…
This. Every PR I have to do ctrl-F "load diff" and then immediately click on _all_ of the diffs. It's !@#$ing annoying.
I've also lost comments when the comment is part of a review and pushed to the PR after the the PR has been merged by someone else.