Just wanted to mention some addtional thoughts on the water situation post I wrote about last. I think I figured out what bothers me mostly on that. (except for it being expensive) Simply the fact that bigger systems are a lot of times more sensitive than smaller ones. For example if your neighbour's water get contaminated but you have your own well you are not affected but if when the whole system is connected everybody's water will get contaminated.
It's similar to the senseless industrial agriculture. The big scale farming is acctually more sensible to drought and other climate changes, additionally it is less biodiverse and feeds less people instead of more.