I take a different view of bass from the 70's/80's timeframe:
Once synths began to come in, I remember a large bunch of folks began to think that drums and bass would simply be sequenced into songs, there wold be no place for these mundane parts to be played by human beings.
Then when disco hit, say what you will, but it really ushered in a new breath of life for the rhythm section, bought the bass upfront in the mix in lots of tunes. As far as I'm concerned, disco made possible a huge push in 'upfront' bass possible.
Lurking behind the big commercial radio push with that stuff, the Stanleys and Jacos and Jimmies really made themselves known in more serious music. But there started to be more records with guys playing MiniMoogs for bass lines . . . . which led to five- and six-string basses as guys like Nathan East and Doug Wimbish felt they needed to expand their range to double or prevent keyboard bass lines, thereby denting their studio work.
And lots of 80's kids grew up on disco as part of their background as well as Stanley and Zeppelin. Roger Taylor was the biggest Bernard Edwards (Chic) fan in the world, so no wonder DuranDuran had bass lines that were very interesting for 'pop' records.
I'm afraid I'm just not a 'serious' student of serious music; I grew up on the radio, and I really miss it. Just no mystery in an IPod . . .
J o e y