I'm not talking about a musician leaving one band to join/start another. I mean why do they feel the need to be involved in multiple projects when they have a successful band to begin with. An example that comes to mind is the metal band As I Lay Dying, the lead singer also heads a band called Austrian Death Machine which does songs involving Arnold Schwarzenegger. The thing I'm trying to ask is I frequently see bands that have members in multiple endeavors.
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I suppose artists exploring different facets of themselves0