“[W]hile the discontinuance of Kodachrome may not be felt as keenly as that of other recently defunct items — notably Polaroid’s SX-70 film or Kodak’s black-and-white printing papers — the Kodak film has given honorable service for so long (since 1935 in movie cameras, since 1936 in 35mm still cameras) that its demise calls for a send-off more ceremonial than just a quote from the Paul Simon lyric.”