With Google’s recent monopoly status being a topic a discussion recently. This article from 2017 argues that we should nationalize these platforms in the age of platform capitalism. Ahead of its time, in fact the author predicted the downfall of Ello.
Seems like it would be better to have government buy-in to federated platforms. There are some governments that have moved their official announcements to Mastodon, which is a good start.
What the Fediverse really needs to ensure longevity is government and journalist support.