To expand on VAXGeek's comment, Operation Ivy's Lint (Tim Armstrong) and Matt (real name Matt Freeman) now form the nucleus of the very much alive punk band Rancid. They reminisce about their OpIV days with the tune "Journey to the End of the East Bay" on their 1995 album And Out Come the Wolves. OpIV's glory days ran from about 1987 to 1989.

On a personal note, I did not encounter OpIV's music until something like 1996. Suffice it to say that I consider my life prior to listening to their music to have been much darker and emptier than it could have been had I been a little more with it in my youth.