I change bikes for street use.

Actually, I got sick of knobbies on, knobbies off, fenders on, fenders off, rack on, rack off, readjusting the brakes everytime I changed wheels (one was touring oriented and wider), and being without a commuter when the cross season arrived.

I bought a touring bike to cut down on all the bloody changeovers. The cross bike was spending more time on the repair stand than on the road and trail.