Comment by llcooliovice

> There are in-flight proposals for very low-level DOM update primitives, like DOM Parts, which target framework implementations, but I think higher-level APIs like full declarative templating can take even more load off, help prove out and complete the lower-level API proposals, and be really impactful for developers and users.

There is an alternative suggestion to DOM parts which might be a better bet: https://github.com/whatwg/dom/issues/736