Testing via moxi-mate this morning gave results consistent with the channels remaining known and tunable after/if the guide data disappears forever this week.
It's easiest to just wait a couple days, but we could get more data today if someone with a functioning moxi is willing to do various factory-resets, possibly sacrificing their last couple days of DVR service as well as their saved recordings. One question for which we might find an answer: Will the moxi know its zip code or re-learn the channels which cablecard authorizes, and/or re-pair the cablecard properly, if it is reset via various reset methods?
The new company which acquired Arris probably has different infosec rules, different network perimeter & firewall & SBC setups, better network security. Even CEO/executive-VP/CTO/board-member of Arris may not be able to override the acquiring company's infosec & network-security policies without presenting a compelling big-$ business case.
Comcast former adelphia here too. No real problems with cablecards except the expected pairing issues with rookie-to-cablecard techs.
I have owned almost every HD-DVR since the oldest one, the Zenith HDR230 and windows-media-controller. My current leading-edge solution is Tabl6o. I concur with uber-nerd son-in-laws who advise that Tivo is what us cable-customers need if cable-channel content is to be fair-used arbitrarily.
An interim solution that may be son-in-law approved is to DVR OTA only via tablo/recast/HDhomerun. These OTA-on-wifi DVRs really are sweet and the way to go for those of us who used to own bunches of S-VHS vcrs - or super-beta VCRs.
Then for the more elusive spousal approval, consider to build her a solution using an HD-DTA or SD-DTA. No cable-DVR. HD for OTA channels via cable only - the locals should remain in HD even if you pay no HD-tech fee. Consider 'limited-basic' service if it includes the her requisite TV shows with the horny vampires and vampiras. For HD on subscribed-cable-channels, consider to show spouse how to stream HD direct from content provider using content-provider/non-xfinity app. Probably she never really cared about HD vs SD and may prefer to watch via SD-DTA in future.
1. Dump the DVR function for cable-channels. Record OTA only.
2. Avoid X1.
3. Provide an HD-DTA and a streaming-app and easy/one-button method to "change inputs" so that spouse may view whichever shows/channels via either HD-DTA or roku/streaming-device/xfinity-beta-streaming.
4. Provide OTA DVR, something like Tablo or recast or hdHomerun.
5. Provide iPad or other tablet/portable-streaming device as well as making each existing TV setup streaming-capable.
6. Consider emitting vampire or dragon noises while demonstrating the new setup so that even if the demo fails it might end happily with some other sort of spousal approval.