Authors:

I think at one point, a whole new younger generation of critics come in and they're really aware of zeitgeist in their group, and the older artists tend to get forgotten as their critics retire and do other things or stop paying attention. So there's a factor of aging that I think is to be considered, too. As a middle-aged artist, you kind of get put on a shelf for the young ones.

Source: www.aaa.si.edu
I think at one point, a whole new younger generation of critics come in and they're really aware of zeitgeist in their group, and the older artists tend to get forgotten as their critics retire and do other things or