nah

Why isn't there much talk around these guys like there use to be? These type of acts use to play a big part in message board convos
I think part of it is because from like 2007-2010 we saw a large group of "underground" rappers emerge who would become mainstream to various levels of success, and dominate much of the rap convo on forums like this. Comeback Season, So Far Gone, Mixtape About Nothing, The Warm Up, Overly Dedicated, Flight School, Jet Files, Pilot Talk, KRIT Wuz Here. All of those tapes blew up between 2007-2010 and dominated "underground" rap convos in a way that...Atmosphere/Murs/Little Brother/etc did not. And a lot of those artists are still relevant today. Wale is prob the only rapper from that list who doesn't still garner a 10+ page thread here when he drops an album.
You can also point to artists who didn't go mainstream but dropped big underground projects or mixtapes. Marcberg basically birthed that mini NY revival, from the minimalist stuff (Ka, Billy Woods, etc) to shyt like Action Bronson, Meyhem Lauren, Xquire, etc. Freddie Gibbs dropped some noteworthy shyt. There was a LOT of stuff to talk about back in those days from SOHH to The Coli.
Now of days...

I'd say the underground doesn't have those undeniable artists who appeal to wide ranges of "real rap" fans like Cole did in 2009 for instance. Everything is more insular, so what I might like may be trash to another underground fan. I'm a huge Ka and Billy Woods stan, I think they're the best lyricists in rap right now...but lord knows not many people trying to hear semi-spoken word rap over weird beats.