I often wonder whether we need yet another UI framework implementation? I touched on this in my post a couple days ago: https://williamhoyle.ca/blog/2021/vue-has-too-many-ui-framew...
To summarize:
We have 20+ UI frameworks written in Vue. Surely there's enough common ground/code to combine the implementation details for all these common components. For example, OP mentioned the complexities of implementing a modal with some corner cases for 'ESC' behaviour. This is a universal concept whether you're using WidgetUI or TailwindUI. How many times are we going to re-implement a modal/button/dialog/menu?
We have to learn another set of APIs, props, component names, etc... Of course, no one is forcing us to use this. But it seems like we're going in circles re-implementing the same UI patterns over and over again.
I wish we could standardize on a library. Imagine just pulling in GenericUI and sprinkling in your CSS of choice (e.g. tailwindCSS, Bulma, Material, etc...).
I'm a Vue guy, but I think my argument still stands for the React ecosystem.