I vaguely remember a statistic of something like 20 or 30% of the population will be disabled at some time in their life. (Easy examples include old people need

I vaguely remember a statistic of something like 20 or 30% of the population will be disabled at some time in their life. (Easy examples include old people needing walkers/sticks). MS also had a very interesting design for disability brochure that talked about how even a "regular" person can be temporarily disabled - eg if you're holding a heavy bag of groceries, opening a door that needs 2 hands is very difficult. Designing for amputees will also help the 99% of the population doing grocery runs.