It is not even that great of an operating system. iOS has been playing catch up with Android for so long it's not even funny. Honestly, I don't know why you all love iOS so much but hate it at the same time. Android has a lot better operating system. Android has far far FAR better phones out there. Therefore, this is not adding more choices, but taking the choice I and several others make with Apple. There is more likelihood of this same thing happening on iOS than 'nothing changes'. Epic Games Store on PC gobbles up exclusivities where we need to leave Steam to install some games.
Epic sued Google as well as it was 'too difficult' to side load on Android. Then that invalidates all the 'nothing will change' line of thinking. Is there a law in place that every single iOS app must ALSO be on Apple's App Store? One question that demolishes the 'nothing will happen to you' or 'more choice is good' or 'your choice isn't being taken away from this'