Why do People Choose BlueSky Over Mastodon?
https://lemmy.ml/post/22454784
Why do People Choose BlueSky Over Mastodon? - Lemmy
I’s heard news that BlueSky has been growing a lot as Xitter becomes worse and
worse, but why do people seem to prefer BlueSky? This confuses me because
BlueSky does not have any federalization technologies built into it, meaning
it’s just another centralized platform, and thus vulnerable to the same things
that make modern social media so horrible. And so, in the hopes of having a
better understanding, I’ve come here to ask what problems Mastodon has that keep
people from migrating to it and what is BlueSky doing so right that it attracts
so many people. This question is directed to those who have used all three
platforms, although others are free to put out their own thoughts. (To be clear,
I’ve never used Xitter, BlueSky or Mastodon. I’m asking specifically so that I
don’t have to make an account on each to find out by myself.)
Just because BlueSky isn’t federated doesn’t mean it’s (totally) centralized. It uses the AT protocol which means user data lives in a separate place than the app itself. While the BlueSky app is centralized all the user data (your posts, likes, etc) live in a separate place and can be self-hosted. This means that if BlueSky went bust or something, users could easily just move to a new platform that someone would inevitably create and all of their data, likes, follows would all be there.
is that migration documented?
Sort of. There isn’t another platform to migrate to at the moment. But this link explains how to self-host your data (PDS) https://atproto.com/guides/self-hosting
And in general, because of the way the protocol works, you could easily build a new app and just use the data that Bluesky wrote. So another platform wouldn’t even need users to “migrate”, since it’s “being your own data”

Introducing Hubble: A Public Mirror for the Whole Atmosphere - AT Protocol
Bluesky is providing a grant to the creator of Microcosm to build a full mirror of public data on the Atmosphere to help make the network more resilient.
AT ProtocolWhy aren’t there 2nd party apps then if I can easily build a new app?
I’d much prefer to use one that doesn’t poll as often.