I agree with you on the part about SwiftUI. I think a lot of people missed how big of a change SwiftUI underwent this year, adding new frameworks that can easily replace existing macOS ones. I think iPadOS is quickly catching up with macOS, I actually use an iPad as my primary computer, and I do professional work on it such as Graphic Design, Photo Editing, 3D Modeling and Sculpting, Writing, etc. It does all of those things well, and is likely to only improve. I think Apple will make a type of Catalyst 2.0 with SwiftUI that would make it easier to port Mac apps over to the iPad. Even without a Catalyst 2.0, many major apps have decided to move over to the iPad in the last couple years, and I think as SwiftUI matures and becomes easier to adopt, that trend will only continue. 👍🏻I do think Apple will (finally!) solve the iPadOS-isn't-as-powerful-as-macOS in the next few years, as SwiftUI allows developers (including Apple with the built-in apps like Mail & Photos) to effortlessly make iOS (excuse me, iPadOS) apps every bit as powerful as macOS apps.
But that doesn't solve the problems I mentioned above, which are bigger.