A common argument is that Apple is effectively a monopoly, in which case "the market" can't decide. I'm not sure I necessarily agree with this viewpoint, but An

A common argument is that Apple is effectively a monopoly, in which case "the market" can't decide. I'm not sure I necessarily agree with this viewpoint, but Android and iOS are two separate markets because the cost of switching between them is so high, users are subjected to so much lock-in that switching is almost not an option, and users can only use one market at a time. The difference is that while Apple has a monopoly on iOS with its app store, Google does not have a monopoly on Android with the Play Store because of the existence of competing stores (Galaxy Store, F-Droid, sideloading APKs etc.). There are analogies to be drawn with game consoles, but there are some key differences: game consoles are not general purpose computing devices necessary for everyday life; users can own multiple consoles at once; there are more than two competitors; and the cost of switching is relatively low.