I have fond memories of interesting bass lines from my youth (70's). Bass used to move. In the 40's it was swing / big band and the bass was all over the place. Motown ruled the 60's. 70's pop, funk, disco - all had lines. Seems to me these days that bass guitar lines are gone. Bass just sits on the root outlining the chord structure. Am I imagining this or have things really gone downhill from a bass guitar perspective?