Why are there so few blown small blocks?

I've been looking around at blown (roots style) small blocks. Lots of chevys, some fords and almost zero (small block) MOPARs.

Why is that?

I realise that they are out dated tech and now days it's all about the twin turbo, procharger ect.

As far as I'm concerned, nothing is cooler than the sound of a old school blower and the look of that big belt.

Why is it that the small blocks almost never get treated to a cool old GMC hot air pump?