Changing the remote doesn't migrate anything in the issue tracker, merge requests, webhooks, pages or wiki
https://www.youtube.com/watch?v=VYOXuOg9tQI
this adresses some of the issues.
(I believe with all critique on Microsoft they aren't as bad, but want to exemplarize the risk)
GitHub pages is super easy to move except for getting users to know the new domain.
Anyway, there are APIs which one can use to export issues.