> Cable boxes do not typically have bidirectional connections This hasn't been true in many places since the takeover of digital cable in the 2000s. Without a

> Cable boxes do not typically have bidirectional connections This hasn't been true in many places since the takeover of digital cable in the 2000s. Without a bidirectional data link, how do you think cable internet works? Or cable telephony? Or pay-per-view for that matter? It's all on the same line into the same box. > Cable systems don't... Don't isn't couldn't. When talking about solutions to problems, merely describing a problem isn't where the conversation ends. > Sending some out of order I-frame every time a channel was changed means every stream has to be decoded in real-time at the head end That's what I described. The cost of doing it is epsilon. > Cable is a shared medium so every channel flip by every user on a node will to be sent to everyone. If you can stream Netflix while watching TV without hurting your neighbors, then you can receive one single I-frame.