With Solid, you just create some signals in that provider way up in the tree and use them wherever else in the tree. And like only the things that use them will update. So from the user's perspective, they're getting performance of not having to worry about that entire tree rendering. That's one of the things they just get for free without having to have to put the qualifications into their code in intermediary steps or anything like that. You don't have to really worry about it. Because the reactivity is kind of like not tied to the component system at all,. The idea of immediate mode versus retained mode has been around as long as graphics. There's always these different models that improve

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