Sirius XM programming is great stuff. But you don't need rockets and orbiting satellites to deliver noise to radios. Sirius XM itself demonstrated this by offering its content on the Internet, and via an iPhone app.
There are some cases in which satellite has an advantage. For example, when you're driving outside a mobile broadband coverage area and are listening to timely content, such as news. But most of us rarely venture into the wilds, and most Sirius XM content isn't all that timely. Besides, you can't listen if you travel outside North America, or into covered parking. Or near buildings. Or in tunnels that don't have costly repeaters.
Since the whole satellite radio idea was dreamed up years ago, MP3-based music, podcasts, audio books and other sound content has been mainstreamed. Car audio equipment now has a jack for plugging in a media player or cell phone.
If you're going to pay a costly subscription for something, pay for a mobile broadband data subscription, which can bring you the whole Internet, not just sound files. Sirius XM should keep the programming and the content, but drop the satellite delivery and the subscription price, and continue to serve their audience via the Internet.