What is the advantage of writing a Flutter app over a PWA or something like react-native?
You should read on articles about apps that convert from React Native to Flutter to learn why they chose to do so.
I think the article opens by stating a pretty strong disadvantage:
Flutter apps run as Android apps and so are less "native" than something like a PWA or react app, which would just run in the browser.
The article doesn't address my concern at all and I was hoping to have some constructive feedback about that concern, which did not happen.
With regards PWAs, maybe more so on mobile, flutter apps are AOT, Ahead Of Time, compiled for release so they should have better start up times than apps that run on a vm.
The flutter wiki has stuff on the diffent modes. https://github.com/flutter/flutter/wiki/Flutter%27s-modes
Debug mode "Optimizes for fast develop/run cycles." runs on the Dart VM and allows for statefull hot reload.