We're just unfortunate (?) that we live in a period of continuous flux for a form of technology.

The Mona Lisa is just as valid an oil painting today as it was when it was created.

Or maybe we live in a fantastic period of development, when every day brings new tools, new technologies and new knowledge allowing us to do more and more. And for Mona Lisa, imagine the hardon Leonardo would get sitting in front of a high-end graphic station equipped with the best tools available today. Rest assured that he would not complain.