Montana and Idaho are amazing.
Maybe it can be taken as a good sign that we have digressed. No one has seen fit to come out against a standard roof on 16" centers, and no one is strongly opposed to seeing someone pay the extra $630.00 for a walk on roof option. Maybe it's safe to assume that either configuration has its own application and can be made to work within the proper design limitations. I won't need to plan on having a half dozen beery friends on the roof of my trailer in the Daytona infield, so maybe best to reserve the extra funds for plain old maintenance, repairs, and all that other boring stuff.