I think the root resolvers can handle it (at least so far). It's just that these probably unnecessary DNS request to test for a somewhat rare situation are caus

I think the root resolvers can handle it (at least so far). It's just that these probably unnecessary DNS request to test for a somewhat rare situation are causing just about as much traffic to root resolvers as the rest of the internet combined. Note that this will actually be disproportionately higher than DNS traffic to recursive resolvers, because, since these domain names are randomly generated, they won't be cached very well. I think the complaint is not "we can't handle this" so much as "we don't want to pay for this." Now, if you are saying that google should run root resolvers so they can absorb some cost of doing this, that might be fair. Although, I suspect it would be cheaper for them to find a different way to accomplish this in the browser.