Looking at the threads below, very few people are discussing technical things in dns terms like zone or nameserver.

Yeah. The way how most things on the internet prove ownership make the assumption that the 3ld is owned by the 2ld. Extend it once out for country specific ones and you cover most cases that people have to work with.

Then when you consider DNS is fundamental infrastructure and people build secure things on top of it, (ahem DNS challenges for certs), it's remarkable that anyone would want or desire edge cases.