I have three twitter lists I keep for checking up on people who aren't leaving. One on Ukraine, one on UK politics, one on EU politics.

Increasingly I'm seeing people in those lists starting to share BlueSky invite codes, even setting up mechanisms like Google documents to share the codes.

So I think even these groups that stayed on twitter a long time are trying to leave, and as BlueSky grows my existing twitter lists will probably becoming quieter and eventually empty.