When I was her age my "repertoire" as a listener - the music that might have fed a fantasy that I was a composer - was only 50 years out of date. It was some while before I liked some of the more contemporary music (but I was already a big fan of Britten and Tippett). I would have found what she does vulgar even then. I imagine grannies (I intend no offense to real life grannies) with limited experience with classical music being impressed by pretty music that reminds them of one of the pieces they have on that classical sampler they listen to. They might even feel she was a genius.