It would be a momentous task for us to switch forge, ignoring the fact that we heavily utilise CI tooling from GH, and use their discussion features too.
Similarly, we use lots of features on Discord that would be hard to replicate, e.g voice chat, our custom bot, and our use of forum channels for the community.
If you do know of solutions that would not cost us any more (so, free, including hosting), we’d be interested in hearing about it!