At this point, it's mostly about preservation. Kwai is one of a zillion war movies produced more than 40 years ago; unlike the bridge, that movie will forever endure, but so many of its contemporaries will disappear -- a fate entirely avoidable in this age of long-tail hyper-specialized scholarly studies, unlimited data capacity and worldwide p2p redundancy. Art will be lost because of unbridled greed, and this is the real tragedy.
It's a weird feeling when you know that some of the torrents you are seeding may make you the only source of distribution of that work in the world at that moment. Gives you a sense of responsibility if it's good.