Even before this 10-CD commemorative set was issued, I noticed a wash of nostalgia for Eugene Ormandy among baby boomers. He was inescapable for that generation, the progenitor of hundreds of LPs, only a sampling of which are contained here. Ormandy became Leopold Stokowski’s associate conductor at the Philadelphia Orchestra in 1936 and succeeded him two years later, beginning an unparalleled run of 44 years as music director before retiring in 1980, a reign no one will ever duplicate, or would want to. During that time Ormandy led the orchestra between 100 and 180 times a year. That, too, is a staggering statistic given that modern music directors, in their eagerness to spread themselves globally, are essentially long-term guests who drop in to visit their home orchestras for as little as a quarter of the regular season.