There are many projects that have created protocols for decentralizing discourse, including ActivityPub and SSB for social, Matrix and IRC for chat, and RSS for blogging. While each of these are successful in their own right, none of them fully met the goals we had for a network that enables global long-term public conversations at scale. 

step three is to get off Twitter all together, and start building a decentralized media ecosystem that combines the sovereignty of individual domain names with the community of social networking. The v1 of that is a simple joint RSS feed that aggregates multiple independent newsletters, but we can get much more sophisticated with tech for the decen... See more

I may be wrong about this, but I don't think a "better Twitter" starts with a service which is simply a clone of Twitter except with a different community. I think it starts with a community of independent (and independently monetizable) domains that we network together in novel ways, to build decentralized media.