Hmm. That's interesting and good to know because, AFAIK, your comment is the first one to kinda-sorta substantiate what Comcast reps told the OP of this thread. He was told that VOD on his TiVo no longer worked because his area had been "converted to fiber," although it isn't clear what they meant by that. As I've said, it doesn't appear to mean "converting homes from HFC to FTTH". That apparently didn't happen with the OP and his TiVo still works with Comcast TV, aside from the VOD app. But whatever is going on with fiber deployment in the OP's neighborhood is perhaps what's happening in yours with the "stealth fiber" laid along your back yard boundary line. My best guess is that what's happening in both the OP's area and in yours is a pair of developments that are happening across lots of US cable companies, including Comcast: "fiber deep" and "remote PHY". As I understand it, "fiber deep" refers to deploying more fiber in their networks, densifying the fiber network, so as to push it out closer to the end user and increase user speeds (among other benefits). The cable head-ends/nodes, where the network switches from fiber to coax, are pushed out closer to the end user and each node supports fewer end users. "Remote PHY" refers to a change in the architecture of the network itself, specifically in the way that those head-ends/nodes operate to take the pure digital signals from the fiber and convert them to analog physical radio frequency signals for the last short leg of the journey over coax. Remote PHY works with DOCSIS 3.1 and allows for faster speeds to more efficiently become available in both directions at a lower cost to the operator. Perhaps it's the switchover to this Remote PHY architecture that is making Comcast VOD incompatible with all but their IPTV-capable clients (X1 boxes and retail devices like Roku running the Xfinity Stream app). Now, as for the notice you got from Comcast saying that more and more channels would gradually become unavailable without a newer X1 box, that simply sounds like they're making a decision to start moving channels off of QAM TV and over to IPTV, in anticipation of an eventual QAM shutdown (when all of that QAM bandwidth in the network can be devoted to IP data traffic instead, making the network 100% IP-based). There's nothing about fiber deep/remote PHY that necessarily means Comcast has to drop QAM, and clearly they're not completely dropping it yet. So the announcement about an increasing number of channels going away from non-X1 boxes looks, to me, like a business decision to nudge more of those holdouts on pre-X1 and TiVo STBs over to IPTV STBs (X1 and Roku). And once they've gotten nearly all of those STBs switched out, that's when they can completely pull the plug on QAM TV (or perhaps they'll leave a few channels, such as "lifeline" locals, on QAM indefinitely). So it's just a question of how long the remaining STB swap-out will take to complete. I still think 2020 is a reasonable guess. At any rate, I think anyone in a Comcast area who's contemplating buying a new TiVo system with all-in/lifetime service at a minimum of $750 should really think twice. You may very soon no longer have access to Xfinity OnDemand as well as certain channels. And it's quite possible that your TiVo could completely stop working with Comcast TV before you've recouped your up-front investment.