I'm not a user, but I do think there is a need for these type of schemes. Approximately 0% of email users could change email host, and prove their identity bet

I'm not a user, but I do think there is a need for these type of schemes. Approximately 0% of email users could change email host, and prove their identity between the old messages and the new messages. The value is it caps bluesky's "window of abuse". Platforms like Facebook or Twitter have dialed up the enshitification far beyond what I find acceptable, but many people are still on there. A competitor to bluesky can decide how to approach it. Like staying (partially) compatible, and decide to compete on UI, repo storage, or user admin.