Those ESP32-Cam devices are amazing for the price. I bought ten of them from China not too long ago and they are waiting for projects. This is a cool use.
I was thinking it could be a replacement for a Pi Camera or USB camera on OctoPi, since OctoPrint doesn’t need the camera to be part of the same server. A computer vision operation could take advantage of any number of cameras, wide/narrow field of view, stereo, shallow view angle, or whatever, and given that they are only $5 each you can really go crazy.