How important is night vision for a pet camera?

Very, if you leave pets alone overnight or in dim rooms. Color night vision (as on the eufy E30) gives more usable footage than traditional IR, but reviewers we read on r/EufyCam and elsewhere note color modes typically require some ambient light. Standard IR night vision, as found on the Tapo C100 and Kasa EC70, is fine for basic 'is the dog on the couch' checks.