I chose Rebass as a component library for my app. Because Rebass is unopinionated about theming, it needs a theming library. Fine, I chose Theme UI to define my theme and then I started to build my app.
I quickly noticed that all the React components (Box, Flex, Card, Link, etc.) are available in both Rebass and Theme UI. When browsing both documentations, the differences are hard to tell.
What am I missing if I remove Rebass completely? What is the purpose of this library?