I re-read it recently. It still holds up fine, but as the technological equivalent of historical fiction now. When it came out, it had a 1940s section built aro

I re-read it recently. It still holds up fine, but as the technological equivalent of historical fiction now. When it came out, it had a 1940s section built around the tech of the time, and a "modern" section built around "modern" tech. The only real difference is that the later section is now a 1990s section built around 1990s tech.