I think your article was pretty confusing to be honest, because I was under the impression you were referring to not using device-width in the meta viewport, which I was racking my brain for a good reason no to.
The section:
did not refer to media queries and just followed the section on the viewport meta tag. I was assuming from that flow of dialog that you were referring to the viewport meta tag and there was no example code of device-width in a media query to clarify. Your write up is pretty confusing, I’ve got to say.
I’m not sure who would actually use device-width in their media queries anyway, does anyone do this?