That's fine, Miguel. But it should be a choice. Apple's market share is large enough to have them forcibly unbundle their app store and OS businesses (like Microsoft and IE in the precambric era).
If you are against vertical integration, must they also be required to sell iPhones that can support other OSes? Must all devices support alternative OSes?
What about other things? Should Lyft be required to support the ability to use their app with an independent marketplace?
Personally, I am more worried about companies that spread horizontally, like Google, Facebook, and Amazon.
As in, do you think that console platforms should also unbundle those things to make it easier (or possible in some cases) to run separate app stores and/or apps on them?
Because, and maybe this is just me, I really don’t see what market share matters here. Certainly not as a comparison to MS of the 90s.
Then. They'd have to compete on the quality of the console itself, rather than exclusives or moats based on sunk costs in owning copies of games
If phone OSs were a reasonably fragmented market, you as a phone buyer could probably choose a phone that doesn't restrict what software you can run and still meet your other requirements (e.g. tight OS & hardware integration). Also, as a software maker no single phone OS company would have much leverage over you.
But some of these things could also be argued on principle.