70s were agreat era in some regards. I think the 70s represent the peak of Hard Rock. Zeppelin's later stuff, Sabbath, AC/DC, The Who, Aerosmith, Queen, etc. the bands of that group who survived the 70s weren't quite the same afterwards. AC/DC burst onto the scene with Back in Black, but their earlier stuff was way more rocking and awesome. Post BiB everything sounds just about the same. The Who released 2 albums in the 80s (after Moon's death) and they both suck compared to the rest of their discography, Aerosmith for sure peaked in the 70s, after that they had a few scattered hits but when people talk about Aerosmith they think Sweet Emotion, Dream On, etc. Not Cryin or Crazy. Queen kept on being awesome but got less hard.