Comcast is a very successful company. Do they have a great user experience?
What I meant was that some of the worlds most popular sites employ "infinite" scrolling, and it kind of makes sense on those sites.
If they have a great user experience? That's highly subjective. I guess they had a lot better user experience than their failed competitors.
That's like the logic that Microsoft Windows must be great just because it's the most-used operating system. You're completely ignoring all the other factors that are involved in a company or product getting to a dominant position.