If you combine album releases and when that album hype died down. It was a slow death that lasted from 2002 to 2006.
-TLC was done after Lefteye died and their last big album in 2002.
-Boyz II Men released their final album on a big label in 2002 and it didn't have much success.
-Dru Hill released their last "big "album in late 2002. That album hype died down by 2003.
-B2K had broken up by 2004.
-New Edition put out their final album on a big label with Puffy in late 2004 and that flamed out very quickly.
-112 was done after that album in 2005. After they left Puffy in 2002, they started to go down, but they still managed to have a few hits.
-Jagged Edge was done by 2006.
-Destiny's Child was done by 2006.