I picked up on the async headlines and the infrastructure pieces. We talked a lot more about the new reactivity in the beta release. The plan from here as indicated in the article is a series of followups explaining parts of Solid 2.0 in more detail.
The key takeaways are: 1. We've solved declarative async, race conditions/complexity are reduced by the structure of your code.
2. We've collapsed the metaframework layer. Every Solid project out of the box is as capable as a metaframework based on the features you want to use. You can just start a simple client app and go from there.
The result is we are setting the stage that both Humans and AI can do things a single way and fall into the "Pit of Success" by the shape of the solution and the guarantees of the model.