I hear ya. I didn't want to give up the radio either, but I can't say that I really miss it now with all the streaming I get. I guess if you are used to XM, you might miss Howard Stern or Sandra Bernhard? (tongue firmly in cheek)
I think in all honesty I could probably get by without the AM and FM radios but I really don't want to give up XM. due to the fact that a lot of my miles are out in flyover country where streaming sometimes is sketchy. So having a clear view of the sky and XM radio is the way to go sometimes.
I know there are workarounds where I could use the Sirius app on my phone and then Bluetooth it to the car but the difficulty with that solution is if my car has no signal then my phone probably won't either, although in all honesty that is a rarity since the car is on AT&t and my cell phone is on Verizon usually one of them will work. and honestly it's nice to have it native built into the car and available on the touch screen.
So I guess now I'm in for a penny in for a pound since I spent money on this old MCU1 I'll just use it now until it dies for good then look at options which by that time may include a new Model S hahaha!