For people who bought into managed garden the minute it is dismantled you lose "all apps need to stick to do not track me request" you get mish-mash of everything.
This is cost to give others freedom to side load. There is no way to put genie into the bottle if it is out.
Only way I see it would be possible is that Apple could offer fully locked iPhones and multi-store iPhones. Then market could decide what works better.
Developers, especially on HN, cannot accept there is group of customers that just doesn't want to interact them directly.