I would say its a generational one as from what I can see music has become gradually worse and worse over the years (if you do an overview of it...)
Of course there is the odd song from different releases that if it made up more of the radio playlist then the world would be a much more optimistic place.
Neil Finns last album comes to mind which I did not hear on the radio at all, but New Zealand has had all its radio stations taken over by corporations now and big network giants with sharp claws.
So I hope now with the luxury of the internet (which you didn't need so much years ago) perhaps a movement with that might grab peoples attention.
I think of 1995 as the last real great year for music mainly because of the following reasons Oasis and Crowded House, but Oasis messed up their 3rd album and Crowded House ended a year later so.....to me that was the last great year for SONGS.