THe mystique of old stuff is strong.
Some folks just like it better. Others hear what the new stuff offers and want that more.
To each his own.
The one way i would describe old stuff is it has a warmer, romantic sounnd. Not very clear, nor pristine, but it has the belly of the beast in it, and sounds wonderful to some.
Then modern gear is clearer, have great response, true to the musical imput. but it may (and in fact probably does not) not have that warm glow.
So some folks like the new, some the old.
The best comparison IMO is the change in Audio Research from the warmish sound os the Sp-10 to the clear sound osf the later models. Some folks say the last good ARC product was the Sp-10. Other are glad they changed to being clearer.
Plenty of equipment makers have been making strides in clarity and performance, and the old soft warm sound is gone.
If you like the old sound, you have plenty of company, and plenty of stuff to buy that still is like that used.
I am in the 'modern sound' camp. And thought when i auditioned some MAC stuff it was right off just old fashioned sounding, and no way do i want it. So I bought Bryston.