With Apple in control, the developer faces the choice to play by Apple's rules, or lose out on the money to be made in their walled garden.
With Apple no longer in control, the user now faces the choice to play by the developer's rules, or lose out on the app.
That said, I'm actually not a fan of the walled garden approach, and won't be buying an iPhone in the forseeable future. It's just that I do understand the appeal.
>With Apple no longer in control, the user now faces the choice to play by the developer's rules, or lose out on the app.
Android has proven this is not true. Google has the same policies as Apple and does allow alternative app stores. Turns out the world works in a common sense way and everything turned out fine.
A really good example right now is riot. They distribute through their own launcher on PC rather than on steam. They have two sizeable games on mobile right now (wild rift and TFT). In a world where these are downloadable from the riot launcher on iOS rather than the app store, it seems likely riot (and other major publishers who do the same on PC) would follow suit? I don't see how having an app store without hearthstone, TFT, fortnite is the same quality as one with.