Well, it's a funny things how everyone can read numbers differently! I expect that the AIO user base is one that Apple will choose not to ignore, that they had to temporarily shelve it just to give their stand-alone Studio a fair shot to prove itself in the marketplace, I observe, is testament to that.Apple seems to have a pretty high bar for how many sales they need to make a model "profitable". Desktops are probably their smallest-selling line and - in earlier posts - I've suggested a list of reasons why desktop sales are likely to be declining (its a general trend anyway and Apple Silicon has removed any performance advantage between mid-range desktops and laptops) so I guess they think that selling a midrange/pro all-in-one and a separates range would spread sales too thinly.
I'm sure that the Mac Pro is that they see a tactical need to maintain a "pro" media creation routine, although I wouldn't be too shocked if the current Mac Pro is the last of its ilk.
I blame the iPhone - it is such big business that it makes the Mac look like a paying hobby, even though Apple are consistently the 4th largest personal computer manufacturer (probably higher if you ignore the "generic black boxes for corporates" market).
Bottomline, Cupertino knows their numbers and their user base better than any of our prognostications, my expectation is that AIO is part of Steve's Apple DNA and Tim's, too, be it phone/laptop/pad/desktop, and that the AIO lineup will continue on well into the future. Be we educational. corporate/business. home user, small shop, etc., we AIO-lovers know what we want and prefer and all the forum nay-saying and dickering to the contrary will not change that.
32"/6K and 42"/8K XDR iMacs, Tim! C'mon, let's bring 'em on!