Instead of waiting for Apple to fix SwiftUI, it's completely viable to bring your own abstractions, from React to Reason to Elm, to the web. And the cottage community that works on the most niche web abstraction is bigger than the Apple team allocated for SwiftUI.
It has its downsides, and sometimes we're all too eager to beat the drum of how bad the web can be, but it's also important to recognize the web as a fluke of history where we still have some control.
That said, I give Apple some credit for moving their own platform forward in a way that clearly borrows from what we've been doing with things like QML and React. I look forward to the day when my SwiftUI apps work well on both macOS and iOS. And it will be interesting if we reach a point where we don't need UIViewRepresentable because APIs like WKWebView have been adapted for the new declarative model.