Is he talking about ActivityPub[1, 2] and the Fediverse[3]? Just look at Mastodon[4, 5] if you're looking for something like twitter without the centralization and the corporate greed. [1] https://en.wikipedia.org/wiki/ActivityPub [2] https://activitypub.rocks [3] https://en.wikipedia.org/wiki/Fediverse [4] https://en.wikipedia.org/wiki/Mastodon_(software) [5] https://joinmastodon.org/servers
Ideally you would sign up with your own domain (bob@mydomain.com) and point some dns records to whichever instance you want, this way you stay flexible and you own your identity.
There is a github issue for this that is open for 5 years but not much has been done https://github.com/mastodon/mastodon/issues/2668