Are we still building three or four separate frontends for the same product?
React Native Web makes a different workflow possible: a shared component model that can target web, iOS, and Android. Expo makes the development and delivery path even more approachable.
I liked NativeBase's Startup+ Kit because it gave teams a running start with a broad set of application screens rather than just a blank project. It is not a substitute for product design, but a thoughtful kit can let a small team validate an experience before investing in bespoke implementations for every platform.
The interesting part is the convergence: mobile patterns on the web, web reach for mobile-first products, and a much smaller surface area for teams to maintain.