How big was 70s nostalgia in the 90s?

In the 90s, there was a trend of people and culture having a 70s nostalgia wave in that decade. EThe G Funk rap samples so much of 70s funk in the rhythms and melodies, Grunge came from the roots of classic rock, and the that’s 70s show premiered in 1998 in which it took place in 1976-1979. I want to know how big was the 70s nostalgia in the 90s.