Philip, please explain what you mean by traction control. I was under the impression that the Varg is not equipped with any type of electronic traction control.
All modern dirt bikes have some type of traction control. Have you heard Yamaha 4-strokes sputter at WOT as if hitting the rev limiter, even though it is still accelerating? This is traction control kicking in.
The Alta has traction control that did not allow the motor to spin up too quickly, effectively limiting its acceleration. No traction -- still, the motor can not rev itself up and the rear wheel to the moon, even though the resistance is just the inertia of the rear wheel. It works well on many tracks but not all, and it is not adjustable.
The Stark has a "virtual flywheel". This is a very similar principle, except you can overcome more inertia with more throttle. Perhaps, they have also added some other code and other tricks. All electric bikes have torque limiters, too. This is all traction control. Without traction control, any electric bike would be completely unrideable. It would pop wheelies and loop out at 0 mph or dig in deep without going anywhere. Traction control exists. We just want it to be user-adjustable.
Someone who rides chocolate cake all the time probably cannot care less about traction control. But I do. One of the biggest struggles that I have here in Arizona is riding dry dusty tracks. I have seen poor traction earlier this year in Arenacross in Prescott, AZ. All Starks were slow in one long flat sweeper, spinning rear tires and polishing the hard clay instead of cornering, and all gas bikes were cutting underneath them very easily.
A similar problem happens in the whoops. The rear wheel spins up, the rear end drops between the whoops instead of skimming the tops, and the racer loses forward speed. Happens in SX all the time. I heard that gas bikes throw roost but the Starks throw rocks into the 2nd level of the grandstands. That's the virtual flywheel problem.