I've had several ISPs in different countries that do horrible things. Not using NXDomain is one, but I've had some that return NXdomain when they shouldn't, the

I've had several ISPs in different countries that do horrible things. Not using NXDomain is one, but I've had some that return NXdomain when they shouldn't, then cache that result! 8.8.8.8 is consistent and easy to remember, and now so is 1.1.1.1