Well, my main fandom is a book-universe, but the author has been dead for decades (not to mention his having stated once that he hoped other people would play with his legendarium). I've written two fics for Yuletide in other fandoms, both of them book-based, both with safely dead authors.

So I suppose that it doesn't affect me that much either-- except I *do* like to read fanfic in other more contemporary fandoms, and would be very sad if they went away due to fears of "what the authors would say".