I'm more intrigued by AirBNB moving away from React Native - the linked article says "RN was too small a component to bother supporting, and the developer experience wasn't up to par", but I'd like more detail than that.
I've been working with Flutter for the past 6 months, and it would definitely be my "go-to" for any mobile application.
To be fair, I did spend 2 weeks going down a rabbit-hole to get Flutter talking to a .NET assembly by embedding Mono and invoking via JNI/Obj C, so I know the pain of native interop. If you're mostly doing work at the native platform level, then I can imagine why you'd stay away from a cross-platform VM.
In my case, I ended up with a brittle project that was clearly going to be a PITA to maintain & automate builds for, so I just rewrote the component in question in Dart.