Way longer than that. The first KH-11 satellites that Hubble shares its design with were in orbit in the late 1970s.

https://en.wikipedia.org/wiki/KH-11_KENNEN

For historical details of some of the subsystems/stuff that ended up in this category of craft, google "history of Ball aerospace" or "eastman kodak NRO history"

For instance: https://www.thespacereview.com/article/5003/1

It occurs to me that projecting the image of NASA struggling (but always successfully) to deploy this kind of tech might intended be a part of the cover.