If my apps are changing, yes it is changing for me.
Right now I can manage all of my app subscriptions from the Subscriptions screen in the Settings app of my devices. If they open up to other payment methods, my subscriptions are no longer centralized, I have to give my credit card information to more parties of variable trustworthiness, I have to worry about subscription renewal policies for every individual app, I have to figure out different methods of cancelling which could be a more difficult process than hitting "cancel" and trusting Apple will stop the payments, etc.