There has been some online chatter about Comcast dropping Music Choice on non-X1 equipment (legacy QAM devices) in order to free up bandwidth for the X1 IPTV and broadband services. I have Comcast but not X1; I noticed about six weeks ago that they had demapped 25 international channels plus all the In-Demand sports (MLB/NBA/NHL/MLS) channels from my RNG200 program guide, so over 50 channels gone from QAM. I also notice that DVR recordings are now taking up less space, so they have increased video compression.
Supposedly Music Choice will only be available as a streaming app on X1, along with iHeart, Radio.com and other audio services.
I understand about 75% of Comcast customers are using X1, so the legacy QAM will continue to be phased out as the number of its subscribers continues to shrink as a percentage of the subscriber base. Apparently premium services (HBO/Showtime etc) are next on the QAM chopping block.