I find it both interesting and disturbing that, for the most part, when out and about listening to the radio in the car, shops, etc, the general public pretty much listens to a body of work consisting of about 500-1000 or so songs (by my estimation). The majority of these songs were written 20-40 years ago (classic rock, 80's, disco, R&B). I'm talking about stuff like Lionel Richie, The Bee Gees, Madonna, and of course, Michael Jackson. Only songs have withstood the test of time as being "at least listenable".
My earliest memories of the Champlain Valley Fair are probably from about the ages of 6-10. That would put the years around early 1980's. I remember walking down the midway and by the rides, all blaring AC/DC, Def Leppard, Ozzie Osbourne, which at that time was only a few years old at the most. I went to the fair on Monday, and guess what? It's the same exact songs. It's like the whole thing is frozen in time.
The unfortunate part about this is, there are lots of new adult contemporary artists out there, but their music will probably never become part of this overplayed catalog. Not for lack of quality, but because it doesn't have the reputation of being "trustworthy". Places of business are generally not going to put any effort into their music selection, they just want to play stuff people recognize and accept.