I totally get why so many peple are jumping to BlueSky, and I may yet, one day, join them. But I'm still almost exclusively on Mathstodon.xyz, only visiting a few places to stay in touch with a few people who are refusing to move (sometimes for perfectly valid reasons).
Having said that, I invite you to read this essay:
https://pluralistic.net/2024/11/02/ulysses-pact/#tie-yoursel...
I found that it expressed eloquently reservations of my own that I had been unable to put into words.
* https://wilwheaton.net/2024/11/nothing-but-bluesky-is-such-a...
For people who build connections and create content, I advise most strongly that they prepare from day one for having to move. Create your content elsewhere and then copy it to BS, keep a separate record of people you want to stay in touch with. Do not rely on a platform like BS for keeping anything.
The article exactly captures why I am using Mastodon-the-Platform and not BS. If I do put things on BS, I will be prepared to lose them, and connections.
But each person has their own reasons for using any of these platforms. I'm getting great technical content, mathematical content, connections, and conversations on Mathstodon.
PS: For the avoidance of doubt: mathstodon.xyz (carefully note the spelling) is one instance of Mastodon-the-Platform.
PPS: Again, I totally get why people are choosing other platforms, and this is not a criticism. It purely an explanation of my reasoning.