These consoles aint cheap that you can buy one when Sony says its time to move on...
As far as PS2 users at 47 milion, lets not be silly here. I owned 3 ps2's myself, one had DRE, another I screwed up trying to mod in my college days... i know people that went through 5.
I am willing to bet that at no single time of consoles lifespan did they have more than 25 million active units on the US market due to damaged consoles, and people buying slim models as backups because they looked cute and were cheap.







