As a closing point, I can see a point where the protocol evolves to seamlessly include #UX wise #SingleTenant instances without bringing all the server-centric baggage, thus promoting an inclusive leveled playing field for all sorts of federation scaling strategies: #VerticalFederation, #HorizontalFederation and #FlatFederation. (And as a plus, improve #mastodon #onboarding #friction issue too.)
As for I, intend to engage in that discussion and contribute to this extraordinary #foss project.