This is specifically why I call out the federated model as a nice-to-have, not a requirement. ActivityPub is way, way more demanding of CPU and transfer than a

This is specifically why I call out the federated model as a nice-to-have, not a requirement. ActivityPub is way, way more demanding of CPU and transfer than a simple forum, and as a result it's extremely difficult to self-host at scale. You can easily service 10,000 daily active users on a VPS serving lean, statically-rendered forum pages.