Even in the PRL years coffee was widely available and drunk in most households.
Like most things in the PRL coffee was.... kind of available but often hard to get and definitely taken for granted as something that was always on the shelf.
That's one reason Inka aka 'kawa zbożowa' (grain coffee) was a thing then. To me inka tastes like weak coffee mixed with tea.... but like many poverty foods some developed a taste for it and it's still available.
en.wikipedia.org/wiki/Inka_(drink)