Words confer meaning, and help others understand just what the hell we're talking about.
This is one of the reasons which subcultures, like our pipe smoking clique, evolve their own terminology. I see no reason to change cellar to anything else... but if enough of our community agree with Nate, then my agreeing won't matter. Because our culture will change the language.
For my own space, in my own home, I prefer the word retreat. This is what I do in that space, and it is a combination cellar, library, office, study, library, den, workshop, fishroom... Also, I'm not cool enough to be a Hipster and use the term man-cave; although I have a much bigger/better beard than Peck.
$0.05 in the bucket.
-- Pat