I in the St. Louis market area and a few months ago got a letter stating I was going to get a shipment with new equipment. Didn't state why, didn't state what. Nothing ever happened with that as I never got anything.
I have two cable cards, and two tuning adapters by the way.
Fast forward to this week I got a notification that they were going to be doing work overnight and we'd have a service interruption. Next morning everything looked fine, but I noticed that evening that my SDV (switched digital video) channels weren't working on either Tivo. Usually that just requires a reboot of the tuning adapters, which I did. I realized they aren't locking on anymore, just blinking yellow. I know high split is being worked on in the entire market, and I reached out to a Charter friend and he confirmed the OOB frequency the older cable boxes used for their provisioning and interactivity has been removed. At least in my area it did this week.
So it seems these tuning adapters are dead now. Everything else seems to still be working video wise except for the SDV channels. I followed the HSC converter link and entered my info there, so hopefully those will ship soon and fix that.