60B queries a day is nothing, we're talking about root servers that serve as fundation for the internet as a whole.
The other thing that people would be very suprised about is how old the software is on those root server, forget modern libraries with Rust/c++ and the like, it's pretty old tech that is very inefficient.
Edit: when talking about old tech I'm talking about the architecture of the DNS server used, IO libraries and models, caching, data structure and the like, for example a lot of stuff has been done arround web servers to serve things very efficiently, the same could be done on DNS servers.
The other thing that people would be very suprised about is how old the software is on those root server, forget modern libraries with Rust/c++ and the like, it's pretty old tech that is very inefficient.
Edit: when talking about old tech I'm talking about the architecture of the DNS server used, IO libraries and models, caching, data structure and the like, for example a lot of stuff has been done arround web servers to serve things very efficiently, the same could be done on DNS servers.