An extreme outlier: many years ago a Japanese bazillionaire bought a painting for many million... I *think a Van Gogh. He then announced that his plan was to have the painting cremated with him when he died. Art community promptly flipped it's lid. Other bazillionaires regularly buy such masterpieces and install them on yachts that can burn to the waterline or sink.
The point: a painting by Van Gogh is a one-off. Sure, it can be copied, but the thing itself is singularly historically important. A display model? Wellllllll....... there might well have been dozens or even hundreds of them. The decision to conserve vs restore, or just outright strip it and paint it as Malibu Barbie Advanced Sabre, is less hair-pulling, though lots of folks are gonna have thoughts.
FYI, here's a model I restored many a year ago: