Interior Decorating ca. 1972

Maybe someone can answer me this...was 1972 the year it was decided that grandmothers would stop updating their furniture? I mean, recently my grandmother got new furniture, floors, paint, etc, but before that, I would walk into a sea of brown, deep orange, and light green. I expected Austin Powers to come out of the kitchen at any given point. It's always a comforting thought to know your grandmother lives in a "shag pad"!