True, but I think the point he was trying to make is avoid using $^O whenever possible. First off avoid using it in your own code when a suitable CPAN module exists. I'd say the second step would be to abstract out your use of it into your own independant module to localize the OS specific-ness to as few places as possible.
Nothing is worse than having huge if/else trees of OS specific code littered throughout a program.
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