And there you have one of the reasons for which the 12" has flopped and was subsequently retired.
No, the reason is that people are stupid and understand only economic and not economic. And he campaigned against the product for the single usb-c port: wait, but which product today costs $2,000, has a 12.9” screen, and has only one usb-c port? Oh yes, that amazing product that everyone dreams of with MacOS and that they call iPad Pro, to which they also add a $400 keyboard, resulting in a heavier, more expensive and less powerful product than an Air. Absolute geniuses, some people can't fool them!
I believe that the era of ultraportables is over, and if Apple proposes them again it is because, as usual, it does not know where to go to get money, it is a commercial stunt, she no longer believes it anymore. Some products have been strongly desired by Ive, the 12” MacBook, the ceramic Apple Watch Editions, are produced by designers for designers, not for ordinary people, it is like art, it is appreciated by those who at least make the effort to try to understand it.
It’s not that the Air, the iPad Pro are useless products and the 12” would be the masterpiece: everyone theoretically would have its own function, but Apple has stopped trying to teach something, it only makes products whose purpose is to fill niches. Otherwise the successor to the 12-inch would be an iPad Pro with MacOS and a working keyboard that clutter, weigh less than a 12-inch MacBook, and perform twice as much as an Air.
But do you know what the problem is? Who buys MacBook Pros the most if the iPad Pro works so well? And you know what happens if people buy an iPad to use it like a MacBook Pro? Who then wants to do the same things about it. And you can’t do them, because the MacBook Pro weighs 3 times and has a cooling system that the iPad Pro will never have. So what interests do we Apple have in having an iPad Pro with MacOS? None. We sell an iPad Pro that tries, at the cost of a MacBook Pro, and we also sell MacBook Pros. That’s it, that’s the strategy.