One hit single, with a brief slap lick, a handful of album cuts from a band that haven't had a big single in a decade, and a niche genre...
I'm not saying that nobody ever plays slap (or muted), but just that it's everyday use in the majority of music, played by the majority of bassists, is inversely proportional to the amount of time devoted to it in music stores, and demo videos.
This wasn't about who likes slap / muting etc, it was just about product demo's, demonstrating the product effectively to a wide audience, rather than a niche.