As far a Corvettes go, I think the C3 received the most “changes” to the model design over all other Corvettes.
Compared to the C2 for example that model line received hardly any body changes over the years. Three different fender grill designs, three hood changes, back up light repositioning, not much else springs to mind.
The C4 had one body alteration, the front rear bumpers.
In comparison the ole C3 shark received quite a few changes during its lifespan which was a long one at some 14 years. It did indeed age very well to my eyes. It was a unique shape, and is probably the most recognisable Corvette to most people’s eyes.