We're a far more affluent society than we were back in the '60's and '70's, when a lot of us - me included - were kids. With affluence comes more discretionary income, and with more discretionary income comes choice. Take a peek into the garage of a typical middle class family today, and compare it to what you would have seen 40 years ago, and I'll guarantee you that you'll see a lot more leisure gear than you would have back in the old days.

Bikes have competition, and attention spans are shorter.