[boubiyeah]

No matter the underlying technology, "lightweight, truly reusable UI components" is almost an ideologic dream, at the web scale. (some companies might achieve it on their own scale with a lot of effort, but not sure for how many years)

As the maintainer, you don't want to cave in and add every possible configuration option people ask for so you have to decide what's a good, thin API for your component and it will never be enough for some usages. Styles are that much more subjective and even vary with design trends over the years!

It might be possible for very, very simple components like text inputs but then again, those are also the simplest to code directly in your framework, so you could wonder, why bother with an inferior programming paradigm in the first place?

The sweet spot for web components really seems tiny.