(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
Not only that, apparently Bluesky is not even living up to their own ideals (TLDR: Bluesky is not really decentralized... "yet"): https://beige.party/@possibledog/113367997579738126