In the world of Prius, I'm a latecomer, with a Jan/Feb. 2001 delivery of a 2001. Only about 38,000 miles on it.
My mother ordered her 2002 in June of 2001, Nov. 2001 delivery. She wouldn't trade it for the world, even for one that did come with the Navigation system (which she didn't order on hers because she didn't know what it could do at the time)
In July of 2003 Toyota offered us "Pioneers" (those who ordered through the old internet ordering system) to pre-order a 2004. My husband saw the chance to have his own Prius (rather than always stealing mine), so he jumped on it. Then Toyota ignored the internet-ordered pre-orders, and just sent cars out willy-nilly to dealers, asking them to fill the preorders from that... <grumble> Got our 2004 in Nov. 2003 (cars started deliveries in Oct., my dealer had Pioneer preorders through end of Dec.), but a friend of mine was able to just walk into a dealership in Nov. 2003, no preorder, just a dealership with no Pioneer orders, and picked a car right up off the lot, while others were still waiting on lists... (<grr> not upset with my friend, he was lucky, just really annoyed at Toyota for ignoring such a useful tool as the internet ordering system and screwing the Pioneer orders...)
Anyhow, the number of 2004+ Prius now outnumber the Classic Prius on the roads in the US, growing even more every month... So, us Classic owners are getting drowned out. That, and a lot have been turned off of these groups with all of the repetitive newbie questions - most of us "just drive it." and love it.
