Last time I had to cancel a Comcast subscription it took half a day of phone calls, and then I still had to hand-deliver the modem to a pretty dodgy service centre the wrong side of Dorchester
I forget the other details, but remember to never do business with Comcast or their subsidiaries / partners.
(Sorry; off-topic, but I needed to rant)
https://arstechnica.com/information-technology/2014/07/call-...
the cable boxes finally got EoL’d, a tech on a service call promised (lying) that the contents would sync to the new boxes, and replaced them. they were empty - my mom was in tears when she realized the DVR contents were gone forever
some of the things recorded had sentimental value (a sibling being listed in the credits of a show, etc) and also that her mental model of what she watched and had in her queue to watch was gone (sports games she had yet to watch, progress through a show)
the stickiness is UI familiarity but also the value of what might not be there with a provider change are both powerful reasons to not make changes