Apple would then be forced to make touch a viable option on macOS. Which is easier, adding touch interactions to macOS or adding the 80% of features from macOS that are missing on iPadOS? Yes they haven't been working on it which just means they're 10 to 20 years behind.
I would contend adding touch is the shorter route as they already have much of that functionality from the trackpad. Swipes would be scrolls and forward/back function calls and so on.
I would argue that the iPad is not 80% missing features. I think it is more like 5-10% missing features, if you try to list them they end up being related to the closed ecosystem or small things that are mostly edge cases that don’t have a large detrimental impact on the main experience.
I think macOS is not nearly as close as you think it is. It would be a transition more jarring than apple silicon because it would mean not just a recompile but every single app would need to be reworked to make sure it works for touch. Every game, every app, every utility, somehow bringing in the command line, etc… this is not a small or easy task.
Some would say that iPadOS should stay as simple as possible and to not add all the features of macOS. But that's also the point. It's not adding buttons and toolbars everywhere it's putting the functionality itself in so it can be used by those who need it. Sure Smart Folders is not something that every person using mail "needs" however anyone who's searched for the same thing in mail twice would benefit from it.
iPad OS needs to grow but it doesn’t need to replicate macOS.
I think the iPad would benefit from a menu button (that brings up the same menu that you can invoke via holding command when you have a keyboard connected) to make hidden features more accessible since they will be visible in a list.
Without getting too far into Stage Manager yes, they missed the point of being able to resize apps and not have them overlapping. Being able to put 4 apps in each corner instead of literally shoulder to shoulder.
They really should have added smart folders a long time ago as it debuted on macOS something like 18 years ago and a single efficiency core in modern iPads is typically stronger than whole machines back then.
Yes they should have added smart folders. Stage manager is a bad windowing paradigm that tries to reinvent the Mission Control wheel and does so badly.
Indeed we should keep pushing Apple to make iPadOS better however after 10 years of them meandering around I'm out of hope they're going to. And it wouldn't be giving up on it, it would be iPadOS on touch devices for people who work better that way and macOS on touch devices for people who need to do more than watch TV and read the news.
Bringing macOS to iPads is giving up on improving the iPad for more complicated use cases, if they aren’t forced to innovate they wont. Modern Apple doesn’t appear capable of consistent focus on all of their platforms and seem to neglect them from time to time.
iPad OS is way way better than it was 10 years ago. iPad OS 15 finally got multitasking to a great place from a window management perspective. Lots of missing features but it was at least really good at the ones it had. The drag and drop within the multitasking switcher was an amazing improvement that really made it easy to quickly create and destroy app groups as needed (Stage manager breaks this feature so I leave Stage manager turned off on my iPad).
We have been advocating for it. We've been asking Apple for it since the 90s and demanding it since 2011. Apple's only response has been "meh"
What we want is a touch device as portable as an iPad that is as capable as a MacBook. Is that iPadOS that's caught up with the times or is it a touchscreen Mac? I don't know. What I do know is iPadOS is missing so much functionality I have to go back to my Mac to accomplish even basic tasks.
A touchscreen Mac should be a 2 in 1 convertible, since the mac is a keyboard and pointer first device.
An iPad by contrast, is touch first device.
If apple isn’t going to make a touchscreen mac why would you expect them to make an iPad with macOS? To me the only reason they would do this is because Tim Cook’s Apple does seem to have a habit of just shipping things when there is enough user complaints regardless of whether or not it’s a good idea. Ex: iOS 7 and iPad OS 7 responded to the users complaints about skeumorphism lead to a huge loss in power for the iPad as so many apps got so much simpler and therefore worse as the iPhone versions replaced the more complicated iPad versions. Pages UI is still borderline worse on iPad than it was back in the iPad OS 6 days because it still hasn’t got the quick format bar back.
These two platforms start at different points and should have different UX designs.
To bring this full circle to the OP's post is he doesn't have any of this conundrum that we have. His device is running the same Windows you'd find on a tower PC. The only limitations on him is storage space, literal horsepower, and what he feels like doing today.
I actually don’t have this conundrum most of the time. The iPad gets me 90-95% of the way there already and i have a mac for those rare cases it doesn’t work. The iPad (for me) needs a few things mostly in the hands of app developers (including Apple) to take it seriously and bring ALL of the features from the desktop app to the iPad version. I don’t want the desktop apps moved over unmodified (even in pages where the macOS pages UI is better than the iPad version because the iPad version doesn’t adequately use the screen real estate - give me a right hand format pane!).
I don’t want macOS on my iPad I just want more investment in iPad Apps. Before Apple abandoned UIKit Catalyst had so so so much potential. Now we are stuck with Swift UI which is no where near as good on macOS as UIKit Catalyst was getting (in terms of performance and reliability).