When I commented on power trios, I was thinking of bands like Rush, Cream, ELP and the Police. All with the elitist posture that seemed to say, "We're such spectacular musicians that we don't need a rhythm player". But at the end of the day, playing long extended leads (which was the mainstay of all of these bands, with the possible exception of the Police, whom I despise primarily because of Sting's uberwhiny voice and grating persona) with only a drummer and bass player providing the groove is needlessly limiting.