I suggest to abandon our Roadmap in favor of Github issues. I don't think that the Github issue has any disadvantages, and saves us from having to maintain the Todo_XH plugin which implements the core of the roadmap. The benefits of the Github issue tracker:
- discussion on the issue is directly possible
- reactions would allow for voting, and could also be contributed by those who are not entitled to vote (those votes would not count, but might still be a useful indication)
- if a bug is fixed or a feature request is implemented, a respective commit message would already close the related issue including a link to the commit, so that saves some manual work
It might be a good idea to migrate even the archived roadmaps to the Github issue tracker for better reference. Nonetheless keeping the existing roadmap in read-only mode appears to be reasonable – at least for a while – because there are a lot of links to it (for instance, in the release announcements).