The chemistry that Nas and Hit Boy have now is very similar to the chemistry Nas had with Salaam. Two people who found each other at the right time, had similar visions when it came to music and knew how to execute that vision in a way not every rapper-producer team can. They just fit together.
The only problem is Nas and Salaam were never able to do it for an entire album, and I think they could have. The label didn't really get what Street's Disciple was supposed to be which is why it ended up like it did, but if you look at it, a lot of the good songs were produced or co-produced by Salaam ("Message to the Feds," "Nazareth Savage," "Sekou Story," "You Know My Style," "Street's Disciple," "War," "Thief's Theme"). Then there's the unreleased stuff like "Talk of New York" and "Serious." People bytch about Nas needing the Illmatic sound again, but if there's anyone that could have pulled it off, it's Salaam. He was the absolute best at giving Nas hard, grimy street bangers and you can tell his sound brought something out of Nas' songwriting. But at the same time, he could give him smoother stuff like "Get Down" and "Cherry Wine."
Hit Boy is the producer that Nas needs right now. He said Hit Boy is his Quincy Jones, which means there's an incredible level of trust there and I've never heard him talk about any other producer like that. But Salaam is very important when looking at Nas' career because they were on the same wavelength and when Nas said "fukk the mainstream," Salaam was right there with him.