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Apple is selling devices TODAY that aren't capable of the full set of features in their latest OS release. This isn't a "we finished our transition to Apple Silicon - these new features will only be available for Apple Silicon Macs." This is them continuing to sell Macs starting at $1800 USD that will immediately become obsolete as it relates to running the full software stack.
Car companies do this all the time. Certain vehicles get the "new generation" of entertainment systems with lots of new features, functions and capabilities. While other vehicles from the same manufacturer will have a much older system, and they can both be model year 2022.
 
I would upgrade my MacBook Air (2018 model) for an M1 version IF Apple would allow in store trade ins. I don’t want the hassle of selling it and I’m NOT mailing it to their trade in partner Phobio for them to damage it or tell me it’s broken on arrival. It took 6 weeks to sort out a Watch trade in with them and Apple was the one who had to force the credit.
 
I was more surprised that this didn’t seem to be the case (until finding out now).
 
Everything on that list (except maybe the updated maps/globe) looks like it requires some pretty heavy machine learning. In other words, requires a 16-core neural engine to power it. I don’t think it’s that unreasonable of a requirement, the power simply isn’t there in Intel’s outdated chipsets.

Maybe the maps and globe are working some under the hood magic that requires it too, to make all that data scroll smoothly maybe. Just a guess.
 
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