They really were the good old ays....not many cares - everthing being spontaneous and just happening
In terms of dance tracks Felix's Dont You Want My Lovin? was stunning, do you also remember:
Leftfield - All of Leftism Album
The Beloved - Sweet Harmony
Usura - Open Your Mind
Bjork - Big Time Sensuality
Bjork - Violenty Happy
Prodigy - Outer Space (I'll take your brain to another dimension!)
I think that the first song that could be regarded a "proto-techno" is "I Feel Love" by Donna Summer. It was well over a decade ahead of its time when it was relased in the Summer of 1977. Giorgo Moroder was a genius.
Cars by Gary Numan is another ahead of its time oldies - from '79 and it was also stunning.