Teen Spirit hit in the fall of 1991. It wasn't an overnight thing, but 1992 saw a quick rise in the grunge bands. I remember noticing how depressing music became around that time. Around 1994, I remember Korn, Wu Tang Clan, Dr Dre, Tool, and Nine Inch Nails on heavy rotation on MTV. That's when I quit listening to modern music for several years. Whenever I read things regarding the way things changed in the early 90's, it seems like a lot of people either think or convince themselves that it all happened in an instant. The way I remember it was more like a snake shedding its skin. Not a snail's pace, but like a flash of lightning either. Just gradual. "Hair" metal was still pretty popular until late 1992, even mid-1993. Warrant's Dog Eat Dog (1992) went Gold, Leppard's Adrenalize (1992) went triple platinum, Scorpions Face the Heat (1993) went to #21 and probably close to Gold, Winger's Pull went to #41 in early 1993. Etc. After Smells Like Teen Spirit, there were still hair bands hitting the top 10 all the way until 1993, when Firehouse's "When I Look Into Your Eyes" became the last top 10 hit in the hair metal genre. Between 1991 and 1993, except for Smells Like Teen Spirit, not a single grunge song cracked the top 10, despite heavy MTV airplay. Only a few, softer alternative hits, like Soul Asylum's "Runaway Train", and Spin Doctors "Two Princes", became genuine hits. Grunge, while certainly popular among rock audiences, had no crossover appeal.