Sigils are *not* ugly! They are useful to show the type of values. Your contention that they "fall down with references" is mildly 'true', but not for the most part. Even if its a reference to a hash, you still know its one value, a scalar value, thus fufilling the point of the sigil. And more over, if you see " %$foo" then you know $foo is hash reference. And you can easily determine what type it is, merely by using the ' ref' function. I love sigils, they also help to make the code visually distinctive, you can always tell what is a variable and what is a keyword, and allowing interpolation is just a ++
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