It's obvious that your take on the seventies is 'dance' music orientated, or you might remember the birth of 'rock', with Zeppelin, Cream and all that. Or you might acknowledge the birth of punk (mid 70's), roots reggae (mid 70's), heavy metal, Jazz fusion, Steely Dan, funk and, let us not forget, the earliest rap and hiphop (Afrika Bambaata, Kurtis Blow and the Sugarhill Gang)....
It wasn't ALL Abba, the Bee Gees and Donna Summer

Nearly everything we listen to today has its' roots in the seventies. And, to be honest, little today has managed to surpass it, except technically. Yes, there was little bass on the records, because they WERE records

Heavy bass used to make the needle jump out of the groove. We turned it up at the amp... problem solved!
But one thing you can be assured of. Every single singer you listen to from the seventies performed those songs entirely by themselves. No AutoTune, no 'comping', no studio trickery. Few of today's stars could even dare to sing on record without it (or their sales would plummet!). And an awful lot of them use AutoTune for live shows, too, or mime to tracks. This would have got them booed at a concert, but nowadays, no-one cares.
Karaoke Nation...
