PS I have a personal theory on why people still insist on traditional backpacking, and it's this: the ladies in their lives.
My sister (a heavyweight backpacker) finally helped me understand this. Basically, girls in general have a higher affinity for (perceived) security and cleanliness. (Not all girls, not all the time. But your average female could be said to place more importance on security and ability to get clean and stay clean than your average male.)
So the more your camping setup is big, complicated, and "Eddie Bauer," the more comfortable/relaxed/secure your (stereotypical) female companions are likely to feel. And the more likely they are to, well, you know. Want to come… err… along. Well okay I'm not articulating myself well here. Please ignore any double entendre you may think you are reading.
Anyway, back to the subject. I say who can blame the heavyweight backpackers? I'd hump (excuse me) a 50-lb pack 6 miles a day for the comfort of my girlfriend. The fact that it would take me 4 days to walk a distance I could dayhike is irrelevant, I guess. In that hypothetical situation, there would be different drivers. After all, lots of us go car camping right? There are different drivers for that, too.
When it comes to true Backpacking, for me, my goal is simple: get to places that take more than one day of walking to see. I camp to walk, rather than walking to camp. But I also have a girlfriend who hates the bush!

