History didn't start with that movie, you know. Salieri's work was not performed e.g. in Russia, where the influence of Pushkin's "Mozart and Salieri" was particularly strong, throughout the 19th and 20th centuries. For part of the 20th century, I was a witness to that myself - I heard several times from friends who were musicians that Salieri's works are never performed because he is thought to have poisoned Mozart. This is why his music was obscure. If he is being rediscovered after yet more slander, well, that's good, but two centuries of the worst kind of lies and calumnies are still a bad way to treat a person, I would say.