I'm all for Forgejo or even a simple forge without any namespaces (I abandoned GitHub when MS acquired them). But the major issue with these alternative platforms is the the discoverability of projects on them. Github doesn't have any noteworthy feature in this regard, but it has the first mover advantage. The users unfortunately ceded that advantage to them.

Many forges are working on a federated development infrastructure. That's great. But I believe that for these platforms to really become popular, we must solve the problem of federated project search and discovery as well. Unfortunately, nobody seems to be paying much attention in this area.