Actually, Thinking about it in a practical way, considering the amount of travelling/gigging/recording that Jon does, there are going to be days when he has to put 15 or maybe 20 songs in "the can" so to speak!
Mind you, it might be fun to here him do a Child ballad whilst driving down the M1!
That wouldn't be accompanied!
(In the UK you can get arrested for using a mobile phone whilst driving, I'm not sure if the same applies to singing!)