Xfinity moving away from supporting QAM/CableCard - aksed to upgrade equipment for international TV

Just received a letter that my international (TV5) channel will no longer be available with my "current equipment". I am using a Ceton tuner with CableCard.
They ask me to upgrade to an Xfinity box. Does this mean that Xfinity is slowly moving away from QAM/CableCard support? I am assuming Tivo customers would run into the same issue?

I wonder if this is related:
https://www.digitaltrends.com/home-theater/sling-international-comcast-xfinity-x1/