I'm not sure I agree with the sentiment that "React is in the past". According to the 2024 State of JS, [it's still used by 67% of engineers](
https://2024.stateofjs.com/en-US/libraries/front-end-framewo...), compared to just 4% of engineers using Lit. If I were to make a library out of this, I'd want to target the largest cohort of developers I could, so I'm not sure writing one in Lit makes a lot of sense.
As for your first comment though, me too! I love abusing CSS :P