The question of whether and how to update older stories for newer time periods is an interesting one. Duane’s problem isn’t exactly uncommon; it faces the authors of any long-running series (be it of books, television, movies, etc.) that is supposed to be set in “the present-day.” Some of them deal with it by ignoring it, but this generally only works for things like movies and TV series where the present iteration is consumed without much reference to prior versions.
(As an extreme example, the Japanese manga/anime series Detective Conan provides an excellent snapshot of Japanese culture from the era in which any given episode was made—but while the characters are the same age at the start as at the end, technology changes wildly around them. The child protagonist who started out relying on blocky Japanese pay phones now carries net-enabled cell phones around in his pockets, but is still exactly the same age.)
Printed matter has it harder. Jerry Ahern’s The Survivalist series (some of the earliest commercial e-books I read) started during the height of the cold war, then moved forward into post-holocaust science fiction, but by the time it wrapped after nearly 30 books the Soviet Union had long ceased to be any kind of threat at all. But relatively few authors seem concerned about revising and rewriting earlier books in series. About the only other one I’ve become aware of to it was F. Paul Wilson, who rewrote his first Repairman Jack novel to be more consistent with the other entries in the series written almost 20 years later.
It seems like it ought to be a good way for authors to breathe new life into their series by attracting new readers who might be put off by older references—and also selling another copy to long-time fans of the original work who want to compare and contrast. (And you can put me in the latter category, though I’m probably going to wait until Duane has one of her frequent site-wide sales before I pick it up. I don’t have the reading time right now to feel like paying full price if I might not get around to it before it’s out for less.)
Of course, there’s the danger of going too often to the well—if you don’t have a pretty compelling reason for requiring a rewrite (as Duane most certainly does here), there’s the danger of looking like you’re just “cashing in.”
Regardless, I hope and expect the newly-revised book will spark some much-deserved interest in Duane’s series, and discussion among readers as to which version is “better” and how well the changes do or do not work. And sooner or later I will be taking part in it myself.