Complex sentence: While a conventional radio show may be able to risk replaying a large part of its music selection from day to day, there would be little point in downloading a music podcast whose selection did not vary significantly from a previous show.
Split into simpler sentences: While a conventional radio show may be able to risk replaying a large part of its music selection from day to day. There would be little point in downloading a music podcast whose selection was did not vary significantly from a previous show.