I think we all knew it was a fad that wouldn't last long when neither Pearl nor Tama even bothered to come out with their own version.
As mentioned, it was highly impractical for the average working drummer. And the cost of essentially buying another drum that you don't even get the pleasure of hitting was lost on most people.
And the sonic benefits that came from using one, while measurable, were small compared to the cost. And once the drums are blended in with the full band, thought a PA or mixing console, I doubt most anyone could hear the real difference. So it was a lot of money and time to achieve fractional, if not negligible, improvement.