I always wondered if the wheel popping up in the air over rocks would cause problems. The sensor detects a wheel spinning at speed, then you get on the brakes at the same time the wheel hits a bump, so the brakes bring that wheel speed to nearly zero instantly, at which point the ABS releases that brake since it is sensing what a skid would look like to a dumb sensor, the wheel lands with little-to-no braking going on, then the sensor detects wheel spin again and applies the brake, you hit another bump, the sensor detects the equivalent of a skid and releases the brake, repeat ad nauseum.
The bumpier the terrain, the worse it would be....which is near disaster on a steep downhill full of loose rocks. On my Non-ABS KLR, there were many times in the desert I'd have full or nearly full lock front and rear on steep, rocky downhills, and I'd still be picking up speed because it was just so darn steep. It's a bad feeling. That must have been how you felt if the ABS kept letting off the brakes when you just wanted them to grab.
I may have to look into EB's cut-off switch after all.