Why is it so Easy to Get 'Mobile First' Wrong? (James Archer)

There’s definitely some logic to the underlying philosophy of the “mobile first” approach to design, but there are also some hidden problems that cause even experienced designers to make some fundamental user experience mistakes. Doing it wrong serves only to reverse the underlying problem, creating a painful desktop experience instead of a painful mobile experience, which only moves the problem around rather than actually solving it. (deep.design)