At a glance, it all seems fairly logical to me. Sanitation as we know it in the US at least depends on a lot of very expensive infrastructure with annual spend

At a glance, it all seems fairly logical to me. Sanitation as we know it in the US at least depends on a lot of very expensive infrastructure with annual spending of about $100 per capita. It's surely far cheaper to stand up a cell tower, backhaul and all than design and build out modern plumbing and sewage handling for the same coverage area. If someone invents a toilet with similar upfront, recurring costs and ease of use to cellphones - the pipeless, waterless analog to a wireless phone - I'm sure they'd have no shortage of customers. Difference is, mobile phones are consumed in abundance in wealthy countries, driving advancements in cost and efficiency which trickle down to make them widely available in poorer countries. As far as I can tell, there's no such driver for toilets as those who have them seem largely content. Perhaps this will change if/when water conservation becomes a more serious topic.