Maybe, but for those of use who live in the real world, those length of games are just no longer feasible.
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If it was feasible back then, why shouldn't it be so now?
Granted, I've less time now than I had during the BG days, but does that mean the gaming world in general has undergone some drastic changes? Even with the little spare time I have, I'd rather play one BG2 than several KotORs.