If it is a genre, hold music, it's fair to say, is a troubled one with few hits. It's not really meant to be loved or even listened to — it's meant to communicate something specific: Don't hang up. (Cornell makes this plea specifically at the end of his song.) Silence is believed to be a death knell for phone calls — people will simply think the line is dead and hang up. This is true even on non-hold calls; it's why phone companies transmit something called a "comfort tone" over phone lines, a barely audible synthetic noise that signals a connection is still there.
-When callers are presented with On Hold Messaging vs. silence or a radio commercial they will stay on hold longer, they are more likely to exhibit interest in the product advertised, they are more likely to retain information, and they are less agitated.

Standard Hold Music Included with every Phone.com account is a collection of standard, royalty-free music channels. Selections include Film Soundtrack, Groovy, Orchestral, Piano Solos, Soft Rock, and more. Premium Hold Music Show outstanding taste and keep callers entertained with Premium hold music.
I’m as surprised as you that Kings Of Leon have songs other than “Use Somebody.”