I'm starting to really like Flutter

Which, in turn, means you like Dart.

Isn't it the same concept as WPF?

@Wisecrack Doesn't WPF use XAML for layouting? In Flutter everything is built using builder functions that return widgets, which are really just classes. The UI updates by running re-executing the builder function for the component that requires the data.

@ScriptCoded

XAML or code for WPF.

I don't know if the UI is rebuilt every update in WPF, I only know that everything is a widget or some shit.