I'm sure it works great, but I dislike adding too many layers to my apps. I've been burned too many times by companies that have stopped supporting and moved on to something else, or disappeared, or haven't kept up with the latest iOS changes, or whatever, and I'm forced to migrate to a different solution, to let myself use these for my personal projects, where I have very limited time and energy.
Even using React Native is more than I'd normally do, but I don't see a better cross-platform option right now.