I think a few classic greats will always throw in a few current names, but I think its because they don't wanna sound "old" ("get off my lawn" is such an annoying comment), or someone with sour grapes, or directors who must not be "open-minded".. Maybe, they are waiting for a possible collaboration with someone young to make money. Maybe they think criticism will cost them cash and/or legacy.

But better than just saying how they don't like anyone, the various reasons why would be neat to read.