You get a small set of APIs that allow you to encapsulate, so what, encapsulation never was the problem. Now how do you bind, how does the UI react to store cha

You get a small set of APIs that allow you to encapsulate, so what, encapsulation never was the problem. Now how do you bind, how does the UI react to store changes, how do you bring state managers into this, etc. We'd be in 2010 fighting the naked dom all over again. As for optimization, vanilla won't be faster than a framework unless you write one from scratch. That means having a scheduler in place that orders dom read/writes, pooled events listening from a single source (the main document), a prioritizer that can cull, something that diffs state in order to render the minimal set of components, etc. Many don't realize the effort that goes into these libs to render as efficient as possible. Even if some stuff is baked into the browser, the field is moving so fast that we get higher benefits from community driven optimizations. And that is an understatement if you look at things like React Fiber.