Desktop media query definition has no max-width

The desktop media query was set with a max-width. Is there a good reason for this?
:itsatrap:

Given that we want to build our styles mobile-first... our mobile style rules are the default. But with a max-width defined for desktop, styles revert to their mobile rules when the browser is stretched too far. Seems to me, in the same way that $mobile is defined as the smallest size, with only a max-width, desktop should be the largest, with only a min.