I am biased - but mostly because I have actively used these in my career for quite a while now and encountered pains with both writing new code, upgrading old code and worst, inheriting code or helping debug someone else's code.

When given a choice, I'd rather use bland React Native nowadays than Expo or Flutter - one is a legacy addon to a framework, while the other sounds like a good idea until you step on a nail or have to read some _bad_ code. And there is a whoooole lot of bad flutter code out there due to relaxed language semantics.