Not related to the content of the article, but they should just invest in responsive now I always get weirded out when adjectives turn into nouns for the firs

Not related to the content of the article, but they should just invest in responsive now I always get weirded out when adjectives turn into nouns for the first time. I think, "Did he mean invest in responsiveness"? "Invest in a responsive design"? I'm sure the weirdness will go away, though. I'm almost comfortable with "mobile" as a noun, and "multiplayer" as a noun seems perfectly natural to me (though "online" as a noun in gaming contexts still has a ways to go).