Follow up to Cox notice

Posting here as I was hoping LongTime_Tivo_U could answer if such worked and was required but understand if mods want to move this to own thread for support.

Were the cards actually different? Firmware change?

My family also received such notice (same dates) but on going into the chat link provided from email they say they can't see anything that we need to do or order.  At first they thought it was modem despite it stating "Cox video services" in the email. I had mentioned I thought it was probably the tuning adapters needing replacement since the location is using 2 cisco tuning adapters/cards. I basically spent 2 hours in chat with  them just to state the notice was probably sent in error as they can't see that such would be needed. So I was curious if it really was the cards and/or HSC's. 

The location for my family happen to be in an rfog neighborhood so it is my understanding there would be no high split for them as far as the internet is concerned (it is my understanding the ONU will only support a mid split if properly configured to as it won't allow upstream above 85Mhz) however I worry that with everything around the neighborhood moving oob "higher" and needing the HSC that even though there is no high split for them that the actual signals will require such and/or they are using a new SDV server that the cisco TAs won't connect to as "everyone" else in the area (since most areas around it aren't rfog) had to switch to the Vecima HSCs'.