But this of course reminds us of the miserable UX we have come to accept from the "mobile web". In the beginning, mobile websites didn't exist, and you just zoomed. Now, it's practically impossible to view the desktop website from a phone at some URLs without jailbreaking your device (if it's iOS). The net effect has been a severe degradation of usability in the worst cases for a small improvement in aesthetics and speed in the best.

I truly hope that PDFs do not meet the same fate, and remain readable on mobile in the correct layout, with no in-document markers that force my iPhone to display it wrong. While that apparently hasn't been proposed here, I don't like even the risk of it being proposed.