That’s a common misunderstanding and absolutely not true. They are abstractions and not reimplementation, and in practice can help achieve way better performanc

That’s a common misunderstanding and absolutely not true. They are abstractions and not reimplementation, and in practice can help achieve way better performance than what would naively come out. React is not a particularly good example of that. They also solve problems like state synchronization and mutations that the browser has zero facilities for. As mentioned in another comment above, in any medium sized project you’ll have implemented more than half a framework abstracting the DOM already.