If the DOM itself is mutable, a primary philosophical problem I have with layering an immutable abstraction on top of it is that the inevitable leaks from thing

If the DOM itself is mutable, a primary philosophical problem I have with layering an immutable abstraction on top of it is that the inevitable leaks from things that lie outside of the immutable abstraction are hard to deal with. It certainly makes sense to me to use immutable approaches in pure abstractions, but the world is mutable, so you have to be extremely clever to abstract that away.