This is really interesting. I'm happy the author covered the effects side of things because this is where I've had some challenges with non-trivial React apps. Sometimes effects can be very complicated and result in React getting stuck in an infinite loop.

Before you say it's because I'm "doing it wrong", Material UI's website had this problem for quite a long time. That issue required doing manual refreshes to not trigger the infinite loops (something you would only see in the debugger). This problem in reactivity is a issue in React that even the best devs can struggle with. My solution was simple... use useEffect less. Depend less on reactivity.

The bottom line for me is that I feel like I can accomplish anything in React, but the devil is in the details. There are so many scenarios that I would need to vet with Solid.js, but if it works better at managing a complex app's reactivity, it could be very compelling.