Watching the much-welcomed Waveform podcast about the #fediverse ...
Here's what he says Federating Social Media promises you:
1. the same connections you'd already got
2. the same core ways to interact no matter what platform you are on
3. removes power from corporations who hold users hostage through their social graph
4. make those platforms compete for the quality of the platform.
This is certainly a different take than usual ...!!
There are still people who ask for your username and password at some other site to log into their's.
I had thought that anti-pattern died out ~ 15 years ago.