In waterpipes it’s alao been done for decades, but in much lesser scale compared to storm or sewage pipes. Most of leaks on waterpipes are microleaks and you won’t find them with robots. And there is also no point of repairing them, because even if cost of one microleak is 100 euros in a year ( and that is already not so microleak), finding and repairing it can cost (depends on location) 3000 + euros and up tens thousands.

Where I live, it’s considered that over 20% is too much, under that is ok. And goung under 10% is too costly to search and repair.