Plenty of twisty DH tracks where dual crowns still rule the roost, you learn to ride around the turning circle issue. I used to ride them a lot when I was in my teens and never had an issue. These days I should imagine that boost forks have improved the turning circle.
If you’ve never ridden a dual crown with a direct mount stem and then swapped onto a single crown, or haven’t ridden a dual crown in years you won’t get it. They simply stay more supple in rock gardens where the fork is being deflected around and the steering feels loads more solid. It’s not big hucks where they feel great, it’s when laying off the coward levers in rock gardens.
https://www.pinkbike.com/news/intends-new-stem-actually-improves-cockpit-stiffness-review.html
You don’t get the kinds of deflection in the stem seen in those videos with dual crowns. You feel that when you move to them.
I reckon a 29er Capra, setup with 170mm at the rear and 180mm DC fork at the front would be a great UK park bike – the axle to crown length would mean it would still be manageable for climbing as well for if you wanted to go and play around at places like Wharncliffe, Grenoside, Chicksands or Aston Hill. At a push, unlike a DH bike, you could still get it around a trail centre – and you could probably keep the weight of the bike at around 32lb!
Sounds brilliant to me!
Then again, I intend to run a 190/180mm setup with my Supreme SX – so I am biased.