Well, in my opinion, I don't see why the Beatles are "so great", and don't give me the influence bullshit. I think The Beatles are the most overrated band that ever existed. And no, I don't care that your mom liked them, or your dad, or anyone. I don't like them.
As for "Not making it past the 90's" Um... Post-Grunge? , Foo Fighters, Stone Temple Pilots, Filter, Breaking Benjamin, and Nickelback are all Popular Post-Grunge bands. Foo Fighters is the drummer from Nirvana, and he's the Rhythm Guitarist and Lead Vocalist. (On the first album, he did everything). So... Grunge's influence is very alive.
Btw, Alice In Chains (Grunge band) is back together (with a new vocalist). I don't necessarily like the new work, but it's Grunge, and it's in this decade... so... yeah...
