Streaming music is all the rage lately. Just ask Apple (NASDAQ: AAPL). The tech giant has its 2015-launched Apple Music to thank for reversing its music business when download revenue was in decline.But how's Pandora (NYSE: P) holding up as competitors come to claim their share of this fast-growing opportunity? After all, Pandora was one of the first companies to bring streaming music to the masses in an intuitive (and legal) format.