I'm confused. Is this argument for responsive versus standalone desktop or mobile, or responsive versus two sites, one for each.

Because I'd like to say that managing two projects, be it two code bases that both have to be created and configured, takes just as long if not longer, than simply building the edge cases needed for an intuitive responsive site.

But there's points for both methods in my books. I just think not accounting for mobile either way is ridiculous (unless a client is unwilling to pay for it).