Weren't the duets albums three releases in a row for the Tops, with nothing solo in between? Just seems like oversaturation.

Motown never learned from its past mistakes. Weren't there several DRATS albums released on the same day, cancelling at least one of them out? I think by the 3rd album, the public had enough.

DRATS/TEMPTS worked because you had a sugary pop lead in the DRATS, and a/n r&b powerhouse lead/s in the TEMPTS. Opposites attract. With Supes/4T, Jean and Levi were too much of the same singer.