You've highlighted a very cogent comparison!

Dinosaurs in the first Jurassic Park were fairly well represented considering what we knew in the late 80s. But our knowledge of dinosaurs has grown, with feathers being the most emblematic change. Yet the Jurassic Park movies steadfastly refuse to put feathers on their 3D monsters in the current movies, because viewers do not expect feathers on the T-Rex.

We might be at that point with repainted statues. Museum visitors are now starting to expect the ugly garish colours.