> You own your account, but not the infra. I'm sure that BBC can manage to run Mastodon by throwing resources at it, but still...not needing to do that at all is appealing.

Mastodon imho desperately needs proper multi-tenancy, i.e. bring your own domain, separate handles, some settings customization, without needing to run whole another instance of the server. We already found out in the 90s that vhosting is useful for stuff like web and email. This would open the door for people to better offer Mastodon-as-a-service.