Owning the speakers you dreamed of 20 years ago

Does speaker technology really change that much?  As I'm listening to my Klipsch Heresy's in a bedroom setup, I decided to look up to see what $3k or so could buy me today used and was shocked to see the speakers I used to drool over, when I was done looking at the Sports Illustrated Swimsuit Edition ;), were available for a quarter or less of the money.

Revel Ultima
Sonus Faber
JM Lab Mezzo 

And more, are all available to buy used.

Seriously these were speakers I would daydream about.  How do they sound today compared to a speaker that you would spend $3k on new or even a few years old?  How could these $10k speakers from a time I can still remember, really sound like a $3k speaker?  My Klipsch's remind me that speakers even older and cheaper are irreplaceable to me, so why wouldn't I spend $3k for one of my old heroes?

What am I missing here?