The late 80’s/early 90’s “grunge” surge from Seattle was definitely a unique moment in the
history of new music. It’s always debated who are true grunge bands and who just
kind of got the title because they made similar sounding music at the time.
Bands like Stone Temple Pilots for
instance, happened to have been making heavy not-quite-heavy metal music in the
early/mid 90’s so they kind of got thrown in to the mix, but it’s bands like Soundgarden and of course Nirvana who truly carried the torch as “grunge”
musicians through and through. Pearl Jam
has always been referred to as grunge because they are from Seattle and were
making popular music around the same time, but I disagree that they are “grunge”
and more just early since of alternative rock.