This was an All Star tribute to Led Zeppelin. This is why they call it ‘classic rock’. Real musicians were writing and performing their own music on real instruments producing memorable tunes that stick in your head for generations. And notice that Plant and Page et al. were in the audience and thought the recreation was awesome. This was the vox populi in the 60s, 70s, and into the 80s when technologically produced music replaced actually playing instruments.