Comments should get transferred just fine across rebases and force pushes. If they don't, you can let me know using the feedback form at the top right.
Supporting other VCS providers, even non-Git ones, is on my list. The underlying data model is agnostic to GitHub so it's just a matter of having demand for it and doing the work!
Supporting other VCS providers, even non-Git ones, is on my list. The underlying data model is agnostic to GitHub so it's just a matter of having demand for it and doing the work!