It can be a good trade if most of your variables are uninterpolated. In that case you want the unusual form to be the "marked" form, which helps prevent mistakes. That's the justification for Perl 6's version of the same trick, only it's spelled \qq[$bar] there.

In reply to Re^3: quotes in Perl (opinionated note on coding style) by TimToady
in thread quotes in Perl by apotheon

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