Me: ...
For example, you can be the administrator on Grandma's device and block access to third-party app stores which cannot be overridden by anyone (including the device manufacturer) without your credentials. Alternatively, you could delegate that authority to a provider you trust. No one is saying you can't keep choosing Apple's walled-garden app store as the only store provider or that you shouldn't be able to block any or even all app stores. Options like that can even be locked by one-time hardware fuses so they can never be changed - even by the owner. The only issue here is Apple forcing a sole monopoly on that control for themselves because it's worth billions of dollars - instead of device owners having a choice.
Err.. Isn’t that exactly what the EU is saying?
Regulators have never ruled that Apple can't have an app store or that the number of enabled App Stores MUST be more than 1 - only that the legal owner of the device have an opportunity to choose. Scenarios like "Oh no, the EU wants to take away Grandma's one safe, simple walled-garden app store so she's left to fend for herself on the dark web" is a disingenuous straw man exaggeration by Apple and their apologists to protect Apple's multi-billion dollar app store monopoly.
Once there's owner choice, even Grandma who chooses Apple as her only app store will pay lower prices and very likely gain other safe options like a full featured Firefox with Ublock Origin ad blocking. Just the existence of competitive choice is beneficial - even to users who choose "no competition". Plus Apple will finally have a real incentive to be more responsive and reasonable with app developers regarding app store prices and policies - which will help solo and small startup app developers.
And I love how the response to shit mobile security is to lock down devices so the people who buy them don't actually own them. Instead of, y'know, actually cleaning up the security posture of these devices.