As of recently, I was looking for rare Nirvana discography when I found a version of the Opinion home demo that is higher quality.
https://www.youtube.com/watch?v=xssk8nqkEhw
It seems like the version of the home demo that we have is not the highest quality version that exists, if you are wondering why I want this so bad its primarily because I am a huge Nirvana fan and I really want to hear the home demo in higher quality. As for the studio demo, however, as far as I know, no snippets were leaked. I am also hoping for that though.