BTW: in answer to a side-point above: ABLS is active even on Sport/Nismo models with VSLD from the factory.
My experience has been that VDC is very intrusive if you're trying to slip the wheels and drive at the sweet spot right on the edge of good traction. You definitely want this car's VDC off for track stuff, even low-level HPDE. It won't save you, it'll just screw you.
I keep it off most of the time on the street as well, because in the rare circumstance you want to push the rear end a bit (e.g. hard accel coming out of a corner or onto a freeway, etc) you don't want it killing your acceleration.
What it's nice for on the street though is unpredictable traction situations where you're *not* trying to push traction limits intentionally. For example, if you're driving in decently-heavy rain and/or on a dusty/gravelly section of road. There are definitely situations there where you might hit a puddle or a slick spot out of nowhere and VDC can react faster than you can if you're not being 100% attentive.
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