It's probably the biggest problem in the ecosystem, for all the papercuts I piss and moan over. The existence of an F-Droid style store on iOS would go such a long ways in stimulating competition. Even if Apple defends their right to tax platform payments, the mere existence of no-cost ad-free software would force other ecosystem players to do better. It's a win for FOSS fanatics and paid software stalwarts alike.

Now, if Apple unlocked the bootloader and promised no more ownership shenanigans, I'd never badmouth Tim or his company's software ever again. This website has my word on that.