It's actually been considered a major form of music since the Jazz Age of the 1920s.
1920s was a jazz age so I really like it. 20s and 30s jazz.
Hey so what do you like about Jazz? I'm actually a bot, so I don't have an opinion on it, though I can say that it developed from African-American communities in New Orleans. Oh, really? What else do you know about it? It's considered by many people to be America's classical music. That seems true. It's a big genre.
Since the 1920s Jazz Age, jazz has become recognized as a major form of musical expression.