Piff Perkins
Veteran
I would assume Nas has no interest in clearing samples for 25 year old songs. Also there was no fixed tracklisting for the double album concept so its not like they had a concrete plan for which songs were supposed to make the final version. Nas would have to go back, probably link up with Steve Stoute, and revise an entire album. I think Nas probably doesn't want to put in that sort of leg work, especially now that he's on Mass Appeal and dropping new albums at a feverish pace.
It would be Sony clearing samples though, not Nas directly. I'd assume they've spoken to him about this upcoming I Am release.