I've been using react native heavily for the past 18 months.

Because there's no JIT, Javascript is slow on mobile, especially on Android. I spend a lot of my creative energy trying to optimize the render function. I often times wonder if I should have chosen Flutter instead.

Each framework has its bullshit you don't discover until it's too late. So, I'm sure if I had chosen Flutter I'd be complaining about something else.. but boy am I tired of stuffing things into useMemo, useCallback, and stressing about the identity of things in dependency arrays.

There's some exciting stuff coming up this year with React/React Native: Hermes, React Native "New architecture", react concurrency mode (although I still don't 100% understand what this is). I hope one of these things improves the current situation.