The @MainActor is nice. It was always bewildering to me that we still had put UI operations on the main thread by hand. I still don't get why we need @MainActor

The @MainActor is nice. It was always bewildering to me that we still had put UI operations on the main thread by hand. I still don't get why we need @MainActor. The compiler should do some sort of flow analysis and do the right thing.