Well Princes of Perlport ... Sigils or not sigils, is this here the question?
Many styleguides in many languages tell the programmers to use a naming convention e.g. special post- or prefixes to distinguish which datatype you use. (e.g. Hungarian notation)
For me, well done sigils are just a build-in naming convention and perl6 tries to go this way, by making @arr[1] acting like $arr[1].
And IMHO Perl without sigils already exists, it's called Ruby! ; )
UPDATE: seriously, changing the parser such that he accepts variables without sigils IMHO results in reinventing Ruby...
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