The Gershwin threat was seemingly felt by all American-born classical musicians: they feared his genius. European-born classical musicians weren’t threatened, and the list of Gershwin admirers includes Otto Klemperer, Jascha Heifetz, Dmitri Shostakovich, etc. The Gershwin moment is right now. Music historians study and esteem him (they never did before). We no longer segregate Rhapsody in Blue on pops concerts (as the Boston Symphony did until 1997). – Joseph Horowitz