Folgers' ads aside, I can't say I'm particularly taken by instant coffee.
My mother did keep it around for years, typically on the counter behind the cooktop. It was probably mostly used as a "I feel like having something to drink, but don't feel like brewing a full pot" things. IIRC, she called it "fake", not "instant" coffee...
These days, I will drink it, but it's not a routine thing. It can be handy to keep around for power failures, assuming one has a way of heating water (e.g. wood stove, or small campstove), although, of course, it can be argued that if one can do it, one could heat the water just a bit more and make French press coffee, which is better.