I only experienced the death wobble one time, and that was on a particularly rough stretch of interstate in Arkansas. The expansion joints on the highway were at exactly the right spacing that it caused my truck's suspension to resonate at the particular speed I was driving, and within seconds it was bouncing like it was going to come apart, with no prior warning at all - scared the dog poo out of me. As soon as I slowed down a bit, it stopped. I went over the suspension and tires with a fine toothed comb and could find nothing amiss.
Since it appears to be a resonance issue, if it happens repeatedly it should be "fixable" by changing the sprung mass / damping response of the suspension - i. e. , by applying different shock absorbers, springs, or wheels / tires. Changes in any one of those components, or driving at a different speed over the problematic stretch of road, might help resolve the problem.
I have seen other vehicles exhibit suspension resonance, but it usually results in violent shuddering over pavement ripples etc at a particular speed that makes the car feel like it has lost road contact. The only time I have run across a front-to-back violent bucking like my truck's death wobble was in a Chevy Blazer that had been lifted with large tires and wheels installed. Those short wheelbase type vehicles always seemed to have a little bit of that front-to-back "bucking feel", but with that particular rig the motion would get pretty violent. I had never experienced similar action on a long wheel base vehicle though, and would not have thought it possible for a truck as long and heavy as a one-ton Dodge dually to undergo similar bucking.
For those who haven't experienced it, suffice to say that the violence of the motion would shock you
