keep in mind that Elvis Costello and Bruce Springsteen have mad respect for Billy Joel. And his album The Stranger is considered a masterpiece among the Soto Zen set. Basically his music both stands the test of time and you really had to be there to appreciate why its great. and don't forget that he sells out Madison Square Garden every night.
Billy does play “Summer, HIghland Falls” and “Where’s The Orchestra”? In many of his concerts. As a pop songwriter, I place him in a group with McCartney, Webb, Bacharach and others of that style. He sing with the best of them, and plays his axe like a monster! Billy is a pure musical genius.