What exactly is the advantage of Swift UI over Flutter? Maybe it's slightly more efficient since Flutter does its own rendering, but in my experience I've never run into issues with performance.
And I think everything should be web apps anyway (ideally PWAs), but I like that Flutter lets you produce a desktop app from your mobile app with very little effort. Even without any special "integration" with the OS, it's better than packaging a web app in Electron, right?
Our app is written in SwiftUI because of the ease between iOS, iPadOS, macOS and Apple Vision. There is just minimal configs to make it work between them. I don't this can be done with any cross-platforms.
Flutter doesn't really need any special configs either. Going by platforms, I think most developers would rather target Windows + Android + Linux over Apple Vision.
And I think everything should be web apps anyway (ideally PWAs), but I like that Flutter lets you produce a desktop app from your mobile app with very little effort. Even without any special "integration" with the OS, it's better than packaging a web app in Electron, right?