Eh... tpab is a rnb/neo soul/funk/jazz/rap fusion... shouldn't be compared to a straight up hip hop album. Plus it has cringe worthy moments like ain't free, u, I, and the pac interview.
It's more neo-soul/Hip-Hop than it isn't though.
There's "For Free ?", "i", that just have Kendrick spazzing on instrumentals
that clearly do not fit the definition of "Hip-Hop" one is Jazz the other
is a nearly unaltered Soul Sample.
The rest are pretty blatantly Hip-Hop and they take clear inspiration from
ATCQ, Slum Village (more specifically Dilla), D'Angelo, The Roots etc.
There's some contemporary Hip-Hop there like "Alright" but a great deal
of it's heavily rooted in more traditional Hip-Hop or at least what is viewed as such.
The harmony might be on some other ish with the musicians modulating into
different keys mid-song or the focus on fusing acoustic instruments with
electronic instruments but without a doubt, it's a "Hip-Hop" album.
Put it up against somethin by Jason Moran or Hiromi Uehara or a name
more commonly seen on The Coli like Herbie Hancock and you'll see what I mean.