Harsh . . .but fair point. They were good, but Traffic were better. IMHO.If you think one quite good album, about a quarter of which is taken up by a drum solo, qualifies a band for "greatest supergroup ever" then that says a lot about how low your opinion of all the others is.
I suppose it depends how you define 'super' And whether they were smashing and great at the same time
I suppose most 'super groups' should be reclassified as vanity projects.