Janet sold seven mil and came back out in 89 after dominating 87, whitney sold 14 mil in 85 was out in 87 with her second Mike Jack sold 8 mil with Off the Wall in 79/80 by late 80/81 Mike Jack had trimuph with his bros and then released thriller WHAT ARE YOU SAYING nobody in Heartbreak NE sold close to those numbers to take off for 3yrs especially
tlc - top of 92 debut, follow up end of 94
swv - 4 years between albums
xscape - 2-3 years between albums
tony toni tone - 2-3 years between albums
mint condition - 2-3 years between albums
jodeci - 2 years between albums
guy - 2 years between albums
r kelly - 2-3 years between
need i go on? that's what i'm saying. TAKING 2-3 YEARS BETWEEN PROJECTS WAS NOT UNCOMMON regardless of whether you were a platinum urban act or multi plat pop star. plus add in the fact that a lot of black artists had big songs on soundtracks that extended their relevance while they didn't have a new full album out.
edit: and janet took from 89 to 93 btwn rhythm nation and janet, mike bad, dangerous, and history were all 4 years apart...like i said, that timeframe people took time between albums