I ride retro for 2 reasons.
1- I like the old stuff as it is where my roots are and it's what I know.
2- Lets be honest here, it's cheap...
...I have a XT clockwork and a XT/XTR mix RC200.
If I had to have a new bike I would probably have a Kona Kula Deluxe.
If I could justify the expense then a IF steel deluxe, rigid forks, with XTR shifters and mechs, Tune cranks, hubs etc and V brakes would be mine!!
Same way I am saving up to get a 1980's Audi Quattro, if I won the lottery I'd buy a Audi RS6 Avant. But I can't afford it so I'll take the 'classic' so I can still have the pleasure of owning and using top line kit with less outlay. Also like the Pace and the Orange it is an Iconic 'thing' and I do like the kudos attached to owning such an item.
This is my take on it anyway.
Somerset, like 'Heartbeat' with newer cars!
Retro MTB: 1992 Cannondale M1000 Deore XT M730. 1992 Raleigh Dyna Tech Quantum Deore XT.
Retro Road: 1992 Eddy Merckx Corsa Extra Telekom Shimano 600 STI. 1993 Dyna Tech Ti Campagnolo Athena 8 Ergopower.
Modern: 2004 Wilier scandium Ultegra 6600. 2014 Wilier GTR Ultegra 6800.