Dude's basically loudly announcing to the world that twitter's ripe to get replaced. No company is forever and tech companies aren't immune, see the giants of the past few decades that became shells of their former selves by not innovating.

Any network effect twitter might've had will get weaker over time as people bail. Hell, the decentralized shit is complete garbage from a UX standpoint yet it's passed 10m accounts because people into microblogging want to not be on shitter anymore.