> They are also not on github, which makes collaboration that much harder. This is now vim-emacs level zealotry. There are workflows which gasp do not mesh well with github. github issues/PRs have almost no metadata and absolutely none that the issue submitter can set.
Github has become the de-facto place to put code that you want others to work with, and it is a platform built to surface such projects and make them accessible in a consistent way.
It's not the only such tool, but it is really familiar to a lot of people, and that makes collaboration slightly easier for those who are familiar with it.