That was before Motown moved out of Detroit, right? In any event, after the relocation to the West Coast, the distinctive sound they had was largely lost.
One from around that same era with great instrumentation was It Takes Two - Marvin Gaye and Kim Weston, with a fine instrumental bridge.
Could be, but by 1970, the recording arts had advanced by orders of magnitude over just a few years earlier. No doubt, the Motown recordings of that time were being done in state of the art studios with the latest multi-track equipment and sound processing gear.
That was a time of exponential improvement in the technology.
According to Carole Kaye, Motown started moving out of Motown and to L.A. studios, where she played on Four Tops sessions among others, in 1965, and that is something that Berry Gordy doesn’t like to talk about.