Please forgive (and redirect) me if this is not the most appropriate place to bring this up. One of my long-standing annoyances is that if I am on mobile and am sent a "regular" (e.g.: https://en.wikipedia.org/wiki/Norwegian_butter_crisis) URL, the responsive magic works and I am silently redirected to the mobile URL (https://en.m.wikipedia.org/wiki/Norwegian_butter_crisis) appropriately.
The problem is, this only works in one direction: Desktop -> Mobile. I'm often using a desktop browser and often find myself looking at the mobile experience because the person who shared the page was on a mobile device. Why does the responsiveness not work this way?