> The vast vast majority of backup cameras ARE analog

The camera<->head unit signal modulation is analog but unless the display is a CRT, both ends of the system are digital.

This is basically why I was asking “what do you mean, analog” - I suspect the OP really wanted either no touchscreen or no telematics, which are totally unrelated to whether the systems are analog or digital.

There was a whole generation of very cool analog computer fuel injection (K-jetronic for example) that avoided most carb problems for end users without going full computer - but, there wasn’t a chance these kinds of system could continue to pass modern emissions standards.