In all fairness I think Dart is Flutter's strength, not it's weakness. It is a very well thought out language, unlike javascript(in the spirit of discussing electron).
There is undeniably a problem with flutter however: while it can be used for desktop applications, it's mobile-first, desktop-sec.. well... desktop-kinda-sorta-works...
Also I think having a highly integrated toolchain is really important for this. Building something cross-platform with Flutter feels just like a fresh breeze even for web which is a beta target (Desktop being alpha). I would have never gotten the idea to write a web app in Dart, but with Flutter it feels just fine. Like Typescript but from Google.
I don’t mind dart, but typescript and electron have the full weight of Microsoft behind them while dart and flutter remain mostly hobby projects.
We did the business case for cross platform, as we’re a non-tech enterprise organisation with 10.000 employees but few developers. We wanted flutter to win, but react native came out like the sound choice.
