Perhaps. Or perhaps he'd already achieved all his goals and could move onto somewhere the 'grass' is greener. His discography is stunning when you examine it between 1973's Catch a Fire and 1980's Uprising. The albums really are worth the effort to listen through in chronological order, especially in consideration of the general dumpster fire state of musical output nowadays. With very rare but notable exceptions of course...

Pretty sure he'd said all he needed to, dropped the mic and exited stage left to squealing feedback with tape echo fx still rolling along.