The Rock 'n Roll genre has been around since the early 1950's and has only become more popular since, morphing and branching off into various sub-genres; all with very distinct sounds, but an underlying foundation of rock music's main characteristics.
Loved this series on VH1 Classic... There is def room to expand beyond the 11 part series (i.e. including death and black metal a little more) and I think some things could have been done better (i.e. progressive and power metal) but in general, well done.