Owned all 6 generations and they only get better, still have 3 of them. Gas mileage, ride fun, and without worry is a daily event. Build quality for the C6 as well as the C5 is great. Hope to live long enough to drive the C7. Just a tad bit on the side of bling in the electronics.
At 70+ age the best features are the ride comfort and ease of entry/exit. Near 30 MPG doesn't hurt much either. Speed is addicting and it is there when you want it.
Better computer accessibility for trouble codes. Otherwise do a face lift and carry on.