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if got me trying to figure out what they might be meaning ... S&G and M&P come definitely from a folky tradition ... however, both used some "wall of sound" techniques in their recordings, particularly their "hits" Sounds of Silence, California Dreaming, specifically ... by their 3rd (?) album "Bookend" S&G were a bit overproduced for my tastes ... and M&P seemed to be moving towards "mainstream" production values.
It's interesting the associations that are made. Obviously ABBA was a GREAT band that I didn't like and still don't, if longevity of enthusiastic fan base is any kind of an indicator... Lawrence Welk is on my TV every weekend ... 'nuf said.