Something that comes to mind is that Github, as part of a "papercuts" initiative...

yen223 on May 3, 2022 | parent | context | favorite | on: Ask HN: What are your favorite examples of elegant...

Something that comes to mind is that Github, as part of a "papercuts" initiative to fix small things, added an arrow that points from the "theirs" branch to the "our" branch in pull requests. That was such a huge improvement for me.