I think the point is that frameworks ' magic isn't 100% there yet. You eventually HAVE to dive deep and understand things about the implementation to understand how to use it.
Ryan builds out Solid's reactivity system (createSignal) from scratch in about 20 minutes, live, in this video https://youtu.be/N-Y32BqhoYQ?t=1100
I haven't bothered fully grokking it because I've never had to understand the impl details. Solid gives me literal dom elements, and that's low-level enough for me.
