This is a place holder for longer thoughts later - right now I don't want to lose the link.
Athena Andreadis has a an article in Skiffy and Fanty titled "Where are the wise crones in science fiction?"
I think it has some excellent points about the youth-worship of SF and fantasy. (When I was a teen, I adored all manner of spunky-girl-against-the-world stories. Now, not so much.) She goes on some directions I think are sideways to the main point, but it's still an interesting read.
However, I find two things far more interesting - first, that as a blow against the lack of older women in SF, she posts a fantasy story (which has always had more old women, although generally cast as the dangerous villain) and secondly, that (unless I completely missed it) she avoids all mention of Gordon R Dickson, The Spirit of Dorsia, and Amanda Morgan. Which is...puzzling.