A few weeks ago I started using Comcast's X1 DVR, as the cablecard in my Tivo failed. What I didn't realize it that cablecard quietly disappeared about 3 years ago. Comcast stopped billing me for having one, something I also didn't realize. I had told myself that once my Tivo stopped working I would switch to Comcast's DVR. By the way, Tivo went out of business last October.
Comcast's DVR is functional, but inferior in just about everything it does compared to Tivo.
Skipping commercials is a fast forward on the X1, while on the Tivo it was a simple button press and it would instantly jump to the end of the last commercial. You never saw the commercials. In retrospect, I think this is why I hardly ever saw ads for movies on TV, as I skipped watching most commercials. It's only when watching live, which is rare, and probably only for news or sporting events, do I ever see commercials.
Tivo must have have some patents that Comcast can't use.

