Cedar and copper details don't mix well, for starters.
In my area there was a tradition of slate for the main roof and standing-seam tin for porch roofs or other areas where falling ice would destroy the slates.
Shakes tend to last longer than sawn shingles because they self-ventilate better, and they contain more actual material.
I think now that cedar shingles last longer than 20 years ago (when they were failing left and right in a few years) because some better details have been worked out. The courses now get interfaced with a spun synthetic material so that water is not trapped between.
Actual seamed-in-place standing seam is always going to be a great material and an appropriate look for an old house. I view with disdain the snap-lock fake "standing-seam look" materials. They don't have the same craftsmanship, appearance or IMO longevity as the real thing.
Casey