alt Hacker News Every tool and shell that lay in arm's reach treated the comma as a perfectly normal and unobjectionable character in a filename.
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mike-the-mikado • today at 12:27 PM
Until someone forces you to use a file system that cannot tolerate commas...
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It's not a completely non special character: for instance in bash it's special inside braces in the syntax where "/{,usr/}bin" expands to "/bin /usr/bin". But the need to start that syntax with the open brace will remind you about the need to escape a literal comma there if you ever want one.