I think EXPENDIBLE is an overstatement. Generally, horns are the least required of all instruments for gospel music. I would rank them in this order....keys, drums, bass, lead, sax, any other horns. I've been playing saxes in my church for over a year, after transitioning from jazz big band playing. I've discovered that most choir directors and MOMs don't really know much about horns and how to best incorporate them into the church band. I play as little or as much as I like. I try to keep it interesting...by not over shadowing the voices. Not a solo hog. I usually play gently during the selection by filling in the gaps here and there, then solo on the reprise. Some selections I don't play at all.