It really hasn't though, Tom; all the unmemorable crap pop music from say, 40 years ago has just been completely forgotten. Hindsight is always 20/20.
It'll be the same looking back on this era in retrospect - people will forget the likes of Kesha (sorry Mer) and wax lyrical about the Hey Yas, the Umbrellas, the Crazy in Loves.
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And if you don't know, now you know.