Comment by WickyNilliams

Doesn't your proposal implicitly introduce the concept of a virtual DOM, which the browser does not have?

You'd need to spec out what that looks like. It adds one new API from the users perspective but much more from the browsers perspective.

Additionally the next generation of Frameworks do not use virtual DOM. Solid and svelte do not. Vue is moving away from it. Signals are directionally where they're all heading.