'Why did the authors of psql decide to have capital U (`-U`) for the user option rather than small u (`-u`)? [closed]

It makes so much more sense to just use the small u -u option for the user option. All other connection options (-h, -p, -d) are lowercase. sudo command also uses lowercase -u for its user option. The lowercase -u option is not used for anything else either.

Then why?

sql postgresql

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'Why did the authors of psql decide to have capital U (`-U`) for the user option rather than small u (`-u`)? [closed]

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