It still kills me he didnt just build ideas with No ID and release another joint in 2014
Hell I still think whatever Nas shelved in 2016 couldnt have been that bad. He was rapping very well on guest verses that year (Sickness, march madness, nas album done. Echo was recorded then. Joshua Hip Hop Kyambo was in charge of mixing the album and liked what he heard)
I wished he hadnt had takent that 6 year break and then done wrong with Kanye and been a little bit more smart with how LT2 was compiled
Judging from Nas's most recent interview and the interviews from 2014-2016, we didn't get a Nas album because:
1) He hates being in the studio
2) He wanted to live outside of the music
3) He was busy celebrating Illmatic
4) He had his business ventures
If I had to guess, there may not be a whole lot of songs that Nas completed during that era. A lot of it is probably unfinished ideas that he hasn't revisited since recording them.
Nas had work with Timbaland that Nas himself described as powerful. Large Professor spoke highly of the songs too. Why we haven't heard them, who knows? He decided that "Skat Attack" was the first inheard song we'd hear in full from LT2 even though he did videos for other songs from it. He released
Nasir, which was 7 songs recorded within weeks before releasing the album he'd been working on for years.