I grew up with Fallout 1/2 and Diablo 2. I guess late 90s. Computer RPGs were so common in my circles, that we actually needed a distinct word for tabletop RPGs (we called them "Pen&Paper"). RPG was always the word for computer RPGs. Only through recent new connections to the "Pen&Paper" world I heard people say "cRPG", around 2015-16.
So I guess it's more about where you are starting from than the time. Even nowadays people use the term "cRPG" and even nowadays people use the term "RPG" to mean different things.
Also, in the '80s, computer RPGs were much more directly inspired by tabletop RPGs. Now video game RPGs are their own genre(s), mostly disconnected from the pen and paper games that inspired the first few generations of video games.