Ah, you're correct, of course. That was my initial thought (because that's how it is done in Linux), but then I read the docs of Win32::ShellQuote which tells a different story:

Windows passes its arguments as a single string instead of an array as other platforms do.

- and then I copied a presumably relevant part of that docs into my reply without correcting the first sentence.

BTW: Windows has other ... interesting ... challenges when parsing command line arguments. Try this:

perl -E "say @ARGV" €