I was forced into borrowing a mates Santa Cruz 29er on a trip to Wales recently (as the pivot bearings on my full sus superlight gave up :roll: ).
After a days riding at Brechfa, I can honestly say that it's the best bike I've ever ridden. I've since sold my full sus and ordered a 29er hardtail
Comparing this to say my 1997 Orange Vit T is like chalk and cheese though.
The modern bike was heavier, but climbed better and would walk over the Orange downhill.
However, when I ride my retro bikes on my usual trails, I always finish with a bigger grin than when riding modern.
It simply tests your skills more, and I love riding them quicker than my friends on their modern bikes