Living with a Compost Toilet (and Toddlers!)
Pooping in water increases by many times the volume of hazardous substance that must be treated.
It also worries me that our critical sanitation is dependent on fragile modern systems. When the power goes off for a while, hygiene is often the second emergency (right after healthcare). It seems to me we should have backups in place, which rely only on local knowledge and locally available materials.