I think what Old Smokey was saying is that it is more APPARANT in laterally "weak" aircraft. You sort of agreed at the same time by saying that it is a function of aircraft with poorer dampening in axes - ergo lateral "unstable" aircraft ARE more susceptible.
Yes, it can happen in ANY aircraft - nobody disputed that.
Dutch Roll in a Lear 45 is INTERESTING, yet fairly quickly recoverable, by riding the controls WITH the roll and yaw.
I believe the B-52 suffered VIOLENT Dutch Roll, mainly as a result of it's MASSIVE fin, and moderately high aspect ratio wing (which apparently also suffered tip flutter at higher Mach numbers). Boeing SHORTENED the vertical stab on the G model onwards, and the "problem" is apparently less severe. The earlier models with the tall fin had been known to suffer twist fatigue of the rear fuselage, and fin fatigue.