[Drew_]

Plenty of web APIs that offer native functionality. Apple will not implement them in Safari for obvious reasons. Apple will also not allow non-Safari browsers for the same reason. Apple knows that even simply allowing Web Push on iOS would noticeably eat into their services revenue.

[kgin]

100%. There's no reason why people can run spreadsheets and word processors and vector design apps on their Mac browsers but have to download a 100mb binary app on their iPhones to order pizza.

Mobile web tech could support the overwhelming majority of use cases without jank with a few key, non-impossible improvements. And they would if there were any incentive for platform owners to do so.