> Performance isn't as big of a win as I'd have hoped.

Is performance a win at all? I would expect performance to be worse than using a regular web framework (React, Vue, Svelte, etc). Because these tend to get their performance from batching DOM manipulations across the entire page, and you can't do that will web components.

I figure web components are pretty much dead in the water for this reason alone. I guess they can be useful if you just want small "islands" of functionality rather a fully client-rendered page.