alt Hacker NewsBut.... why ? Is this assuming a huge portion of the people you interact with on Twitter are also all moving identities to the new platform ?
I can see for something like artistic expression it being useful to export and and move over to a new platform (like moving a whole photography portfolio, short story writing samples, or similar). But who cares about your "likes" on a totally new and separate social media platform ?
It makes the landscape competitive. There isn't really a notion of "moving" to a "platform". It's more like if Twitter sucks, some team can spin out an alternative that has the existing content but takes different product decisions. And then some people can try this alternative and use it without leaving the existing network. So, it allows more experimentation in the market without having to solve the cold start problem. The lifecycle of products becomes more fluid. It's easy to spin something up, and you can also shut things down without permanently killing them.