> But it beggars belief that most of the millions of GitHub's users would switch to something so much more complicated.

I've moved my projects over to my own personal Forgejo (when I don't care about collaborating on them) and Codeberg (when I do). I find that ecosystem vastly simpler in the common ways that matter. For instance, viewing large diffs and syntax highlighted files is unbelievably faster, about as fast as GitHub's use to be before it was "improved".

For every way I use those forges as a solo or small-group contributor, the alternatives are as good as or better than GitHub today. Some product manager could become a company legend by figuring out how and why that is, then getting someone to do something about it.