No one is asking for en.m.wikipedia.org. Someone on their phone asks for en.wikipedia.org (or more likely clicks a link to it from Google or elsewhere), gets re

No one is asking for en.m.wikipedia.org. Someone on their phone asks for en.wikipedia.org (or more likely clicks a link to it from Google or elsewhere), gets redirected to en.m.wikipedia.org (instead of serving a mobile or responsive page directly on en.wikipedia.org), and then copies the resulting link to their friend who didn't ask for any of this. And worse yet, in most cases neither party even notices the `.m.` much less knows what it means or to remove it to get a "normal" Wikipedia. I think you vastly overestimate the number of people typing `en.m.wikipedia.org` in. I'm pretty sure the number of people doing that is negligible, in fact. And by the way, I wouldn't care about the existence of en.m.wikipedia.org nearly as much if it actually were opt-in. Because then it would be a lot more rare. The problem is that Wikipedia opts you into it implicitly if you are on mobile. Which means that if anyone in a chain of clicking on and then sharing a link is on mobile... suddenly everyone sees the mobile link and needs to do much more work than "click on a link" to opt OUT of it. Well over 50% of the Wikipedia links I see these days are mobile links and 0% of the time am I clicking on them from a mobile device.