I think this boils down to how one would define "regular basis" and "ready to install." Superchargers appeared on cars as early as 1937, so on that "technicality", we are both wrong. What I have been referring to is the explosion in availability of ready to bolt on kits and wide spread usage that emerged primarily as part of the street car craze in the late 90's. The small electronically controlled 4 cylinder engines are streetable and economical, but when you add a charge air system of some type, can really lay down the HP. However, if your only intent in the dialog is to be right, pat yourself on the back and have a nice day.
No, I’m talking about the availability of kits.
They started to be available in the 1970s; I remember watching my father and his friend put one on a 280ZX in the early 80s. Very popular in California.
However, what’s really made them take off of late is the ability to install a blower, and then simply reprogram the chip in your car with a laptop. Before, it required either hacks, an expensive standalone EFI system, or other inelegant means to change your fuelling. Since 96, it’s been a lot easier.
That said, places like Jackson Racing were offering centrifugal blowers *and* recalibrated computers for little Hondas as far back as 84.