It may just be this area, but almost every cedar roof (hundreds) was torn off and replaced at homeowner cost a few years ago. At least two roofs were hit by lightning, and the homes were destroyed. I know it shouldn't have happened.
A new roof adds 6% to the home value, according to the Board of Realtors. Here, a cedar roof would kill any chance of resale. Here, other alternative shingles are used for these high end homes.