One more reason to like @Observable: It isn't just a SwiftUI feature. You can use it in AppKit and UIKit views too, so the same observation model works across all three frameworks, the same per property tracking everywhere.

Deeper dive in my WWDC26 talk, Use SwiftUI with AppKit and UIKit:
🔗 https://developer.apple.com/videos/play/wwdc2026/272/

We're live! The SwiftUI Group Lab at WWDC26 is starting now, Apple engineers taking SwiftUI questions for the next hour.

Join in:
https://developer.apple.com/videos/play/wwdc2026/8006/

Questions are now open! You can submit your SwiftUI questions for today's WWDC26 Group Lab right up until it begins.

Live Q&A with Apple engineers at 9am PT:
https://developer.apple.com/videos/play/wwdc2026/8006/

SwiftUI perf tip

In lazy containers (List, LazyVStack), the view ForEach produces per element should be a *constant* number of views. An if inside the closure means 1 or 0 views, non-constant, and hits a slow path.

Wrap the condition in a VStack:

ForEach(namedFonts) { namedFont in
VStack {
if namedFont.name.count != 2 {
Text(https://namedFont.name)
}
}
}

or filter your data upfront.

Debug with: -LogForEachSlowPath YES

🔗 https://developer.apple.com/documentation/swiftui/foreach

My WWDC26 session is out: Use SwiftUI with AppKit and UIKit 💡

I walk through incrementally adopting SwiftUI in an app you already have: using Observation to update your AppKit and UIKit views automatically, embedding SwiftUI into an existing view hierarchy, bringing gesture recognizers across, and adding full SwiftUI scenes without rearchitecting.

🔗https://developer.apple.com/videos/play/wwdc2026/272

I'm joining the SwiftUI Group Lab at WWDC26 this Wednesday, a live online Q&A with Apple engineers about the week's biggest SwiftUI announcements 🧪

You can register now, then submit your SwiftUI questions in the hour before we go live:
📅 June 10, 9–10am PT
https://developer.apple.com/wwdc26/schedule/949P6QKZFA/dashboard