As well as what others have said about the popularity of electronic music I'd also say that there is a flip side to the coin. In my local scene, it's all singer songwriters, all the time. Individual girls and guys with an acoustic guitar and rarely with any other instruments. Everyone seems to want to be a singer songwriter and it can be hard to get a rock gig as venues are struggling and audiences dwindling. In a climate like that, being a bass player means it's simply harder to play as many gigs.