The wiki is trivial to export (it's just https://github.com/gollum/gollum https://github.com/gollum/gollum, and you can clone the git repo with your wiki data d

The wiki is trivial to export (it's just https://github.com/gollum/gollum https://github.com/gollum/gollum, and you can clone the git repo with your wiki data directly). Issues and PRs are less trivial, but there's nothing inherently difficult about writing an exporter. The lock-in mostly comes from the ecosystem of third-party tools that's gradually developing which either only support github or work poorly with other hosts.