Shouldn't we be caring about smart phone app stores though? From elsewhere in the thread, Apple's app store revenue is 3x Google's and they both charge about

Shouldn't we be caring about smart phone app stores though? From elsewhere in the thread, Apple's app store revenue is 3x Google's and they both charge about the same in fees. The number of phones or iOS users seems irrelevant to the sales that go through the app store, and that apple is using its position as the app store owner to force app developers to use other apple products like Apple pay