A rope is 6 feet long...duh.
I have a flite on my bridgestone MB zip that's got probably 20-25k miles on it? It's been crashed and the leather stitched so many times that it ain't pretty, but it's still going strong. That said I'm sure some folks will get finicky after 10k, and some won't notice any apprieciable lack of cushioning, etc until way beyond 25k.
My pretty $200 fizik Arione has a leather cover that's paper thin and I'm careful even leaning that one against a rough wall!!
Damn comfy though.