I doubt CAN bus will be around that much longer, I know several EV manufacturers are actively phasing it out. Yes, it was revolutionary in it's time but it's a 40 year old standard that doesn't have enough bandwidth for the requirements of modern cars, and it was designed before security was even a thought. It's also unnecessarily complex wiring that adds weight to the car. Even the updated FD standard is only 8 mbps, so it's barely enough for video from a backup camera.
It's a tool that's more than sufficient for most things. Video isn't one of those, and it's a 2-wire bus, so I don't see what the wiring concern is!
As I understand it, newer systems like LVCS and Ethernet use less wire and smaller connectors. Apparently it can save up to 30% of the weight in a wiring harness which would be about 100 lbs. There was a thread on it on HN not long ago.
Video for a backup camera is mandatory on new cars in the US and Europe, so it makes sense to use the same bus.