I would love to see him push further, but feel Nas has taken a good number of chances musically/artistically and there have been times it bombed and times it worked amazing. probably half and half. I'm not about to go through his discog but i think a good number of tracks on god's son and streets disciple saw him experimenting a bitconceptually and musically to great success..."heaven" "a message to the feds"...and then like mentioned above doing an album with Damian Marley...

IMO his experimenting factors into him being the GOAT for me.