I don't think the car analogy really applies, for the reason that there aren't very many third-party services in a car, and not much demand by customers to inst

I don't think the car analogy really applies, for the reason that there aren't very many third-party services in a car, and not much demand by customers to install software in their car. Cars are essentially a single piece of equipment, where the car itself provides the primary value, and the number of people customizing their car is fairly small. In comparison, with computers there's a much clearer separation between the device itself and third-party integrations. Almost everyone customizes their computer by installing software on it, and the computer and OS itself don't provide the main value - instead, it's a tool to run different software applications on it, and so Apple's attempt to control third-party software based on the fact that they make the hardware and OS is an attempt to use their power in one market to interfere in another, rather than just an attempt to control their product. And to take this further: supposing that cars were people's primary computing devices, and everyone began using apps on their car, I would argue that car companies would be obligated to let people install the apps of their choosing. I think the market share argument also tends to ignore the economics of how the software business works (and as you stated, all the high-paying users are on iOS, because they're generally higher-end devices than Android). If I create a new service that Apple won't allow, and it's only available on Android, iOS users aren't going to switch no matter how good my service is (because that involves spending hundreds of dollars on a new device and transferring all your other services, which is a ridiculously high bar to clear). And without those users, the chances of my service surviving are much lower, so it's most likely going to disappear from Android as well. The result is that even though Apple has a minority market share, they end up controlling the entire ecosystem. And in turn, that means that when consumers are choosing a phone, they don't actually have a free choice to avoid Apple's policies, because even if they buy an Android phone, Apple's policies will affect the services available to them. (And since the available services end up being the same, more people buy iOS devices for various reasons, which increases Apple's power even further).