I don't have a lot of interest in relying on some random component I downloaded on a whim. Not even for personal projects.

And for my own components, I can't see how it'll be faster than just implementing them in my own project, or React Storybook.

On top of that, my experience with UI builders in the past has been that they're rather hard to work with and typing out the HTML myself is not only faster, but also more flexible and more likely to end up doing what I actually want... And probably with less code.