Quick, name a PS2 game you played recently for more than 15 mins
Ibara, Mushihimesama and Dragon Quest 8 (last one emulated
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though in the last week the Profeel monitor died and has since been marched off to the big tip in the sky and i have no plans to replace it. So i can see PS2 dropping off - Ibara i gave a run out because i'm going to sell it soon, Mushihimesama because i haven't bothered with the X360 version and wanted to revisit and DQ8 because it's one of those games i converted over and wanted to test out.
I agree with your point though - most of the games on PS2 are dead and won't be revisited. If i don't have time to play, say, Dragon's Dogma why on earth would i make time to play - say - Rule of Rose?
Hence why Emulation of PS2 is a god send. Load up Alcohol120%, insert disk, burninate to HDD, sell game. If i ever win the lottery and want to go back and play some of these games i can emulate them (within reason, some wont work some will...) and if we ever get to a handheld that can run them then they are there on hand + i'll have some cash from their sale.