I started using Frigate and thought about going the Coral route but realized you didn't need them if you have a relatively recent Intel CPU (6th gen or newer) as OpenVino with the iGPU is pretty much on par https://github.com/blakeblackshear/frigate/discussions/5742 .
A lot of the newer SBCs are being shipped with integrated NPUs/TPUs now as well. I would get a Coral if I were to use an older SBC or RPi or older PC as a camera server for object detection. Currently I have an ESP32-CAM watching a bird feeder but that feed goes to a modern server for bird species recognition but I could see a Coral as an option.
Yeah https://zulip.com/ they're actually pretty awesome