[Closed] Why doesn't chainstay length change with frame size.

Yes, and if bicycles magically propelled themselves along the trails, a 55/45 split would be pretty much perfect. But they don't, the rear wheel is driven by a motor system that tends to fall off if the rear wheel loses traction for more than a fraction of a second.

Give me a rear wheel that looses traction before a front wheel all day long.

What I recommend some people try is a unicycling while holding a bar/stem/fork/wheel out in front. Zero length chainstays. Totally wicked fast in the corners dude.

JCL brought up Hill when describing his own lack of skill in 2 wheel drifting. Hill and is indeed king of thus skill in DH racing and has always ridden short stay set ups. Becoming confidently stable while drifting does not require long stays. It requires practice.

Odd that he used Sam as a referance at all, Sam was credited with having adifferent riding style on the flat pedals, leaning right forewards in the corners to weight the front wheel and allow the bike to drift!