Let's frame this in another way: The Beat is KROQ and BPM is Indie 103.1.
So you have your casual listeners who would prefer the repetition, familiarity, narrower playlist and more corporate sound of the Beat/KROQ and the more active music listener who would prefer an Indie/BPM sound.
I *personally* have preferred BPM over the Beat over the years. That said, like Tony, I can at least empathize for the person who misses the Beat when he plugs in to hear a mixshow in the middle of the day or whatever, when he's used to hearing certain tracks one after the other.
The casual listener of dance music who consumes music in the way the overwhelming majority do could have benefited if they had kept the Beat as well as BPM. The reason The Beat played September is the same reason alternative rock stations play a band like Bush: Sure the music is corporate to those in the hyperactive core, but it's popular and it SELLS.
On the scale of art (100) and commerce (0), The Beat was around a 35 I would say, while BPM is more around 65.