The thing I often ask or mention in discussions about SwiftUI is, if SwiftUI is so good and easy to use and made for cross-platform, why did take Apple themselves for example so long to port their Journal app to macOS? This is a trivial application, something you'd have found in a beginner programming book as an example project 10 or 20 years ago.

I get all the points about Swift and SwiftUI in theory, I just don't see the results in practice. Also or especially with Apple's first party applications.