That comparison doesn't really work, because MSFT had an effective desktop monopoly. By contrast, Apple is a minority player in the mobile market.
>They should be FORCED to have an open platform,
Just because YOU want this doesn't mean the Apple users want it. I'm utterly content with a single, curated-by-Apple app store for iOS. I like the stability it affords the platform.
I'd never accept it on a general-purpose computing device, but for my phone it's perfect.
Apple sold 47% of the all smartphones shipped in the US in Q4 2018
2. 47% is not a monopoly
Market share is not the only criteria for determining whether a company has a dominant market position under EU competition law. Apple have a substantial share of the mobile phone market and they have a total monopoly on iOS app distribution. If you want to sell apps to ~27% of consumers in the EU, you have no choice but to go through Apple. End users might have a meaningful choice, but developers don't, which is highly relevant in this case.
And you should be able to choose that. But should you change your mind, you should be able to take your purchases with you and go elsewhere. Although apple is in the spotlight here, all of these vendor-locked app-stores are the problem.
That's Apple's magic trick. They only own the top 20% of the market (evading monopoly attention) but they extract almost 100% of all profit in the smartphone market. No idea how you'd legislate against that though..
No one told Google to skimp on customer service and make 18 chat programs that don’t work. No one told Microsoft to drag their feet on preventing malware from destroying the usability of their system. It was Microsoft’s choice to profit from letting manufacturers sell computers riddled with malware that you had to spend hours to remove after buying. It’s google’s choice to not offer product support such that you can’t use their “flagship” devices for 5 years.
Apple invested in setting up their retail stores, training employees well, making their devices easy to use, and now they are reaping the rewards.