It's super-cool to see an alternative approach to dealing with Wikipedia content disputes. In the past, when there have been Wikipedia forks, they haven't gene

It's super-cool to see an alternative approach to dealing with Wikipedia content disputes. In the past, when there have been Wikipedia forks, they haven't generally tried to stay in sync with Wikipedia, at least not in both directions. Do we have an example of long-term forks of collaborative software or text editing projects that did manage to keep sharing productively in multiple directions? Maybe the BSDs to some extent? I wonder how much work people are willing to do to keep actively collaborating with people whom they have big ongoing disagreements with (at least in areas where those disagreements don't have an impact). Or can such collaboration be made relatively seamless with appropriate tooling?