Earlier cameras did not have WiFi but used to have a local SD card onto which they'd record and overwrite. It would be dead simple (and inexpensive) to use such

Earlier cameras did not have WiFi but used to have a local SD card onto which they'd record and overwrite. It would be dead simple (and inexpensive) to use such a camera with a buffer of a few days that would transmit using WiFi once a day or so instead of relying on real-time transmission. Wonder why these fancy solutions don't have such a simple mechanism but rely on an inherently unreliable medium...