In aviation? Literally everyone. Context clues should make it obvious.
The article title is talking about location data and computers, I've seen many people forget floating point precision when comparing and getting bit by tiny differences at the 10^-9 or smaller. That seems just as obvious on the outset as non-unique location designations in what the average person would assume to be a dataset that's intentionally unique and unambiguous.
But this is Hacker News, not Aviation News, and there are plenty of people, like me, who might find this interesting but aren't in aviation. I also thought it meant nanometers.