Good move. It amazes me to no end that so many of us managed to get by on bikes that had only 10 speeds (total). Moving to more speeds can put the gears closer together to some degree, but on an older bike with typically a 52 tooth front it adds one to two pretty much useless gear combos. Yes, I think it's great that more speeds are available, and I'm riding 8 in the back, but my observation is that many who want to "upgrade" to a higher count cassette just don't want to feel out of date.