You're half right, but you did miss something that jdporter missed, too.

@{\@foo} is, as far as I know, a truly useless elaboration of @foo.

The anonymous copy provided by @{[@foo]} is sometimes useful when you want to preserve @foo's contents. Example: 

my @mutant_foo = map { mutator($_) } @{[@foo]};

[download]
It helps with for loops, too. That kind of situation comes up surprisingly often and the copy is an effective and unobtrusive solution.

After Compline,
Zaxo

In reply to Re^4: What's so bad about &function(...)? by Zaxo
in thread What's so bad about &function(...)? by japhy

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