I know a lot of people that drive as a hobby. They have "weekend" cars, and take them to tracks and drive them for fun. They dump thousands of dollars into them, and have to have a separate car for daily driving. It's one of the main reasons the automotive aftermarket is in such a boom. It's become a multi-billion dollar hobby industry.

Bikes are becoming the same way. The reason they are selling carbon bikes like crazy is because there's money to be made in it. People want them, and companies make them.

I'm the same for my bike or my car... I have one of each, they're both good all-arounders. My car's not the fastest at the track, but I can drive it home afterwards and then take it to the grocery store. My bike isn't the fastest, but it's fast enough, and I can commute on it anywhere with 50 pounds of gear, which the roadies here won't do.