There will always be beneficial change for consumers if input costs drop in competitive markets. Markets are dynamic systems. Even if the costs don't drop, the person that is actually providing you value via the app will get the money where they can use it to hire more people to improve the product you use.
> The DMA is about developer choice, not consumers
Ultimately it is about both. The idea behind that is pretty much the idea of capitalism: competition drives innovation.
While I personally do not care about the alternative stores, I care very much about stuff like the in app purchases. I am not using Apples subscriptions and all the rules and steps to circumvent the rules make it horribly inconvenient to deal with subscriptions.
I also hate the fact that I cannot buy an ebook in app because of Apple‘s 30% cut
Or would they stay 99 and thus no change for the consumer?
The DMA is about developer choice, not consumers