Thank you!

In my personal opinion, right now Flutter outperforms RN at almost all levels and is now the strongest player in cross-platform development. RN mainly started the trend of functional UI, composition over inheritance, and hot reloading in mobile development, but I think that Flutter really improved these ideas.

I don't say that I would select Flutter over anything else for a new mobile project (or even new cross-platform project). There still can be situations when e.g. RN or Xamarin suit better, but looking back at my projects: for the majority of them Flutter would be a better choiice.