...and there's absolutely nothing wrong with a capella! Most of Anne Briggs' recordings - that I've heard, at least - are a capella, and they're wonderful. Martin Carthy did "Little Musgrave" for 10 minutes on one of his albums, unaccompanied, and I enjoyed that. I think it's something we're not used to hearing anymore, or it makes more demands on the ear than voice+instrument does.