I think he made a proposal to replace them before that as well, let me find it.
https://groups.google.com/g/heatsynclabs/c/C9iD5N3QI4Q/m/dySlOAXlAwAJMe and David were thinking it would be beneficial to replace them with Raspberry Pi Zero w's using Pi cameras so they could be flexible or turned into other things if it didn't work out, the power supplies would be standard micro-usb, and the picture quality wouldn't be enough to cause concern among privacy advocates.
When I brought this up to several people before a million years ago (okay not a million, but probably around the time our fileserver went kaputski), wanting to do some high quality pan/tilt/zoom cameras we could all control and mess with over the web, they were concerned with privacy and distraction.
I'm all for us getting some kind of non-IOT reliable cameras set up though. I was kind of hoping that when the site went down with the server it wouldn't be resurrected prompting innovation, but oh well.
As far as compatible cameras, Jasper I think picked up the last camera we have, and I left a
white one over there to be integrated, but never got to the point of
getting it added to the network.
I can say that the current model cameras (even the newest one) are terrible! One major reason being their integrated PTZ and whenever they reset the homing mechanism was so unreliable it pointed them in different places each time (I fixed this by actually taking the cameras apart and removing the motor's cabling from their circuit boards).
Hope this helps, good luck!