GM dealers simply had the benefit of a manufacturer not providing enough EVs for the consumers. If they can deliver in volume then dealers will have less of a window where they can mark up vehicles as there will be dealers who just want to move vehicles and recoup through manufacturer incentives and hold back.
While I think there needs to be alternatives I suspect a lot of people will be disappointed as many developers don’t alter pricing at all and we are going to see some really scummy behavior by some going forward.
I am a very infrequent user of the app store as is and we have always had freedom on the Mac platform and that just meant mostly other stores with their own embedded fee structure along with having to guess if a site and developer were trustworthy.
So we may just end up in a situation where we have a few large trusted app stores and still have to pay them all.