Pearl Jam is an iconic rock act with a 30+ year career of sustained excellence (Dark Matter is a fantastic album). A lull or two on albums but their live shows are near universally accepted to be among the best in the game over that span. They've generally maintained accessibility to the fans, have been absolute monsters when it comes to charity/giving.
Nirvana was the angst we needed to right the ship out of boy band, but that didn't age well, IMO. Bleach was good. Nevermind was phenomenal. In Utero was very very good but the band was already on a downward trend and their live shows had already started to lose luster. They were unsustainable... not dissimilar to how Guns & Roses were.
They both served / are serving their purpose.
Nirvana were greats. Pearl Jam are icons.
I loved this part of the post especially. I could be off base here, but I have a hard time imagining the majority of people who voted Nirvana popping on Bleach or Utero in the last few years. Nevermind and Unplugged? You will get no argument from me they are epic albums, but the other output they had to me is good to very good. Off the top of my head I thought of 5-6 Pearl Jam albums that are great to epic. Again, personal opinion. PJ's Uplugged was every bit as good as Nirvana's as well. That just showed up on Spotify in the last few years, if people wanted a listen.
Much of the emotion of Nirvana's is the unfortunate tragedy that closely followed. It makes the album that much more haunting in retrospect.
I also love the GnR comp, and would agree. Best case I could see for them would be to get one more great album before they self imploded. So much tragedy in all these bands, unfortunately.