I too find Plyo's to be very beneficial for strength development. My accelleration and top speed was far better when I could top 42m for 10 bounds and cleaning 105kg (~232lb) than when I was box cleaning* 145kg (319lb) and performing more speed. That's not to discount the value of weights, but an illustration of how individuals respond to different stimuli.
I think to say that certain training methods are unnecessary because of XYZ is more an ode to a type of training ideology and in doing so you risk neglecting the athletes individual needs. This type of thinking seems endemic in certain track circles.
When selecting plyometric exercises, like any element of training, you really first need to ask yourself what you're hoping to achieve and what exercises are going to help you achieve this. This needs to take into account what else is going on in other areas of training and how plyo training can complement or supplement them.
So to Cdub, I'd ask: What are you hoping to achieve with plyometrics?
*(weights rest on a box so bar is roughly knee height)