Slightly off topic: I was about to ask, in this day and age of responsive web design, why do Facebook, Wikipedia and others still have m. -prefix websites? On f

Slightly off topic: I was about to ask, in this day and age of responsive web design, why do Facebook, Wikipedia and others still have m. -prefix websites? On further reflection I can only assume it's in order to provide a bandwidth constrained alternative, rather than just a visual change. Still, these look like crap on a desktop, and it's a frustrating leak of implementation details when someone posts a link to Wikipedia from their phone, and suddenly I'm looking at a weird design on desktop. They're so good at detecting when people are on a small screen and redirecting to .m - couldn't they please do the reverse too and redirect from .m to the normal version for desktop clients? And if someone needs a bandwidth constrained version on desktop (developing countries and people trying to avoid data roaming fees come to mind), then maybe we could come up with a better way for clients to tell this when requesting pages, rather than try to infer it from screen size?