What would happen if instead of users swarming existing servers when a fediverse service was put in the spotlight, each user spun up their own micro-instance and tried to federate with existing servers?
There’s always the odd person who decides to host a personal fediverse service in their homelab for themselves, but would the fediverse work if that was actually the primary mode of interaction? Or would it fail in a similar way to now where the servers which receive the most federation requests need to scale up?
Presumably the failure modes for federation are easier to scale than browser requests since it’s an async process.
Sustainable in what sense?
It’s way more sustainable in the sense of “one website is not controlling the entirety of the experience of a given type of service for 5000 users”, for example. I think it’s important to talk about specific kinds of sustainability, and specific threats to it.
Things to consider (apart from bandwidth-related considerations):
Those are definitely things to consider - I’m mostly thinking about technical constraints in scaling fediverse services out to meet large increases in demand.