The application had gotten so large and complex that they were seeing compilation times of up to 15 minutes for their mobile app. This means that even testing minor user interface changes, like moving something around by a couple of points, could take hours (or even days).
I am not so sure if the above argument can strengthen your point.
- Regarding compile time: If the app is so large, React Native can’t reduce the compile time. Might be even longer. In addition, it still requires 2 separate compile processes, 1 for iOS and 1 for Android.
- Regarding testing: Even small UI changes requires hours or days of testing, this still holds true regardless of whether the app was built in Swift, Java or RN or anything else.