Tech has caught up though. A cockroch robot or a swarm of them could enter small passages that are otherwise dificult and time consuming with other means. They

Tech has caught up though. A cockroch robot or a swarm of them could enter small passages that are otherwise dificult and time consuming with other means. They could map the area in various ways, look for signs of life, etc. Oh, and they don’t have to look exactly like roaches. I know many are put off by the likeness to something we find not so pleasant