Well the 1st Super group I ever saw live was Pink Floyd back in 1975 in Tuscon Az when I was in college. Now I have always been a Floydian since my freshman year in high school in 1970 as when one of my school mates told me about them and he let me listen to Astronomy Domine . It was so different from every other song and what other groups were playing plus that was in my learning to play lead guitar phase so hearing these different sounds just made the band special to me. Of course I guess I lived in the golden Age of Rock as I was there for the 1st British Invasion and the 2nd so all the great bands were either starting and putting out their best music during my Teenage years. So I have seen the Floyd at their height and Yes bands in those days did play 2 hrs plus as the 1st concert I saw the Floyd they played all of Animals some of the song names were different All of Wish you were here, All of Darkside then the encore was the full version of Echoes Yes I did have the usual amount of chemical stimulants for the heighten awareness of the music

But the stage effects and giant Screen and videos and remember this is 1975 so the Floyd were way ahead of any MTV or any other band in having special effects I can still remember that concert after almost 40 yrs .
Anyway others I have seen Led Zeppelin in their glory here at Madison So part of that Song Remains the same Movie For those series of shows I was there as Led Zepp played 5 nites in NYC sold out all of them my friend had a father who was a Union Boss got tickets thru the union the best seats I ever had I was in row 9 front center so I got the full Led Zepp sound. I have seen Rush 3 times don't know if you consider TOOL a supergroup but I have seen them a few times.
But my Top super groups are Pink Floyd, Led Zeppelin, Rush, Deep Purple, Jimi Hendrix, at least that's what I would call Supergroups as that to me means groups that can fill stadiums and their music is timeless Now the Beatles and Stones yes they are super groups and I do love a lot of the music they put out.