Other options, such as how the EU is going to force Apple under threat of government force to make changes.
Anti trust laws have existed for a century now. We can make new ones, or use those existing uncontroversial laws to apply to the newer tech monopolies.
If Apple doesn't like it's then they can stop selling their product in every country where this is the law. (So that includes the entire EU, and hopefully the USA soon, as there are laws in Congress being considered right now).
EU antitrust differs from American antitrust, IIUC, because American is couched in harm to consumers while Europe is couched in harm to merchants.
So I can see how the EU might see a way towards saying "Your ownership of the vertical stack makes you a market-maker and market-caller on a very lucrative app market; you bear some responsibility to making that market fair and competitive." This is the same kind of thinking that caused France to crack down on Amazon offering discounts on books that undercut local booksellers because they could collapse the booksellers' guild (even though Amazon's shipping integration means they actually can afford to charge so little).
But in the US, the first hurdle such a case has to cross[1] is "Why doesn't the user and app maker just go to Android if Apple's so bad?" Which, indeed, is the question I'm asking myself here; Coinbase could just jump ship and offer their app only on Android, and then, hey, the Android ecosystem is slightly better than their competition.
[1] ... unless the law changes, of course, as you've observed. I can imagine something coming out of the John Deere tractor "right to repair" angle, though I haven't been following this space.
Well, there are other options.
Other options, such as how the EU is going to force Apple under threat of government force to make changes.
Anti trust laws have existed for a century now. We can make new ones, or use those existing uncontroversial laws to apply to the newer tech monopolies.
If Apple doesn't like it's then they can stop selling their product in every country where this is the law. (So that includes the entire EU, and hopefully the USA soon, as there are laws in Congress being considered right now).