Traditionally, one of the most important purchases home-recording singers and songwriters made was an audio interface.
Modern music has changed, with much of the hooks and musical phrases now produced by electronic instruments in-the-box. A growing segment relies on libraries and loops; so the ability to record real instruments isn’t a necessity to them. Dedicated singers and rappers who collaborate with other musicians or a producer don’t necessarily need an interface either.
It’s substantially cheaper to merge the mic with USB technology rather than take the established professional route of plugging an XLR mic into an audio interface. It’s also easier to setup and less can go wrong with technical aspect as you won’t have to worry about channel selection, engaging phantom power, etc.
USB mics are thought of as prosumer products, so truly high-end USB mics aren’t here, at least yet. The value packed into USB mics by Blue, Audio-Technica and others is astounding. This makes USB mics the perfect choice for an aspiring singer looking to get his or her feet wet.