If it's true that "Apple customers don't want non-Apple app stores," then Apple wouldn't need to use technological countermeasures and legal threats to prevent them from coming into existence. These non-Apple app stores would fail on their own terms.
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This is a point I first raised in *The @guardian* in 2015, with a satirical piece called "If Dishwashers Were iPhones" - a letter from a charismatic smart dishwasher CEO called Absterge, explaining that it's unreasonable for customers to be able to buy their dishes from third-party dish vendors:
https://www.theguardian.com/technology/2015/feb/13/if-dishwashers-were-iphones
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