The "single - for single-letter -- for fullname" option style was popularized by gnu getopt, by far the most popular style. Find has been around for a while and

The "single - for single-letter -- for fullname" option style was popularized by gnu getopt, by far the most popular style. Find has been around for a while and probably doesn't update to that style because of the huge amount of stuff already using find. It's inconsistent in comparison to most utilities, for sure. It's consistent internally, and POSIX-compliant, at least. (iirc)