Couldn't have said it better.
Living in the Northeast, I was never really exposed to their music. I'd see an ad in The Source, or maybe a music video, but I don't ever remember hearing them in a club or hearing anything on the radio. And I don't remember any of my friends talking about them. Just to contrast and compare, I remember No Limit being huge circa 97-99. We all knew Silk The Shocker, C-Murder and Mia X. We all saw Bout It, the movie.
I had a video show on the community access station in my hometown. I remember they sent me the video for Ridin Spinners and I played it on my show, not because I really liked the song, but because it was new, they sent it to me, and it fit my format. I didn't have any reason NOT to play it. And this was around the time they won that Oscar.
When I think about their Oscar win, it wasn't so much that they arrived on the world stage, it was more like 15 minutes of fame, and then going back to being a regional group.
Having said that, I don't have anything negative to say about Three Six, I just think there are better, more popular groups with a better discography, that made a bigger impact (the Oscar Award notwithstanding).
And it's not coastal bias either. I'd rank Outkast ahead of Three Six because I know more of their songs.
If the question was; Is Outkast a top 5 group, I might say yes.
Is Three Six a top 5 group? No
Outkast>>>Three Six Mafia