An in-town or normal use MUP is really for pedestrians and that strange hybrid called a "skater". Too many different rhythms: little kids in strollers, dogs on leashes, unpredictable walkers and toddlers of all ages and impulses.

As for brittle, I got multiple fractures in my pelvis several months ago (cycling crash) and was reassured by the specialist that male bones, especially those that continue weight-bearing exercises, don't particularly grow more brittle or easily broken with age. Joints and connective tissue may stiffen and "dry out" and flexibility may have to be worked on, but we don't necessarily shatter more easily. However, he was telling me this while tracing fracture lines for me all over my x-rays. I know, it seems somehow counter-intuitive. Just to be sure, I don't ride 3 inches off anyone's wheel anymore.