How does that follow? The more densely populated an area is, the more accurate geo-IP usually is as well, just like with other infrastructure (postal code areas are smaller in cities etc.)
Regarding NAT, CG-NATs are usually still reasonably close to the first interconnection point to keep latency low. And as that stops being the case, IPv6 is getting more and more common in any case, precisely because CG-NAT doesn’t scale that well.
Regarding NAT, CG-NATs are usually still reasonably close to the first interconnection point to keep latency low. And as that stops being the case, IPv6 is getting more and more common in any case, precisely because CG-NAT doesn’t scale that well.