Remember. Most of us are mortal and only clock up our 3 score years and 10 on earth. I like buying the same stuff over and over. Just imagine if you were a 40 year old Dark Side Of The Moon fan You would probably have the Original vinyl LP, The Quad Mix, The 8 Track cartridge, The 4 Track Cartridge, The Orb's ambient bootleg, The SACD Hybrid, the DVD A, the 20th and 30th Anniversary editions, the Pulse live CD, the Classic Cuts DVD and a h*ll of a lot more. And without as much as a bonus cut.
I have one of the smallest JMJ and 808 Collections and even I have lost count of the Oxygene and Pacific mixes I own! And just before 808 retire, there must be the MTV unplugged and Duets album. And of course the definitive final mix of Pacific 666 - Armaggeddon Mix just before Judgement Day. I wonder if Iron Maiden fans ponder what we do? Nah, they just buy the same old stuff over and over, or maybe it's their kids who now do the buying?