(by the way, if you haven't seen the talk, here's the link: https://www.youtube.com/watch?v=F1sJW6nTP6E)
And in case you're wondering, yes, the Bluesky team did know about Solid. Before announcing the AT protocol, they did an "ecosystem review" in which they studied all the existing solutions they would proceed to ignore: https://gitlab.com/bluesky-community1/decentralized-ecosystem/-/blob/master/README.md
Having said that, Dan's talk has made me reconsider my opinion on Bluesky. I trust him, and I don't believe he'd be lying to our faces. So I may dig into the details to learn more.