Maybe you should blame Mike for being lazy compared to Prince, James Brown, Elvis Presley, The Beatles, etc. who were constantly recording. They had an excess of unreleased material. After 1982, Mike only had 4 albums in a 27 year period. Maybe another album worth of collaborations with others (Rockwell, Stevie Wonder, Paul McCartney, Dave Mason, etc.). The Jackson 5 released the same amount of albums in 2 years, plus the Motown solo Mike, Jackie, & Jermaine records. There are still over 250 unreleased J5 related songs on Motown including an instrumental solo album by Tito. Jimmy Jam said Prince would write, record, and mix a song in 1 day, and he was often playing all of the instruments, which is a slower process. Jimmy said Mike spent an entire week on a drum track until he was satisfied.