The irony is that while equipment may be getting better, the physiological equipment we use to listen to them only gets worse with time! It's a pretty safe bet that the ears you used to listen to those Genesis speakers back in 1995 doesn't hear frequencies the same way now, 21 years later.
Seriously though...I agree that there are improvements in cabinet design, such as the use of aluminum, carbon fiber and advanced materials to create enclosures that are more inert, with more advanced CAD/CAM software available to speaker designers. But Paraneer is right...my new BMC PureVox speakers use the AMT tweeter, which is almost as old as me. Yes, there is constant "improvement", but great speakers have sounded great for a while now. I've always been a Sonus Faber fan - still have a pair of the original Concertinos in storage - those Cremonas were wonderful 10 years ago, they sound wonderful today, and they'll still sound sublime 10 years from now.
Seriously though...I agree that there are improvements in cabinet design, such as the use of aluminum, carbon fiber and advanced materials to create enclosures that are more inert, with more advanced CAD/CAM software available to speaker designers. But Paraneer is right...my new BMC PureVox speakers use the AMT tweeter, which is almost as old as me. Yes, there is constant "improvement", but great speakers have sounded great for a while now. I've always been a Sonus Faber fan - still have a pair of the original Concertinos in storage - those Cremonas were wonderful 10 years ago, they sound wonderful today, and they'll still sound sublime 10 years from now.