I've used iOS for over a decade without needing to install apps outside of the app store. I would guess that the vast majority of iOS users share that experience. I understand you might be frustrated by those limitations, but to say "hold off on this until it's fixed" seems pretty reasonable.
It's pretty ironic to hear a complaint about the walled garden, when the only apparent way to solve this "0day" is probably going to be to put up another wall.
It's pretty ironic to hear a complaint about the walled garden, when the only apparent way to solve this "0day" is probably going to be to put up another wall.