You raise a valid point and I'm definitely not "complaining" about anything. Like you, I "usually advise against" that usage.

My intention was to point out, quite unequivocally, that there was a difference between

&sub(@args)
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and

sub(@args)
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Reviewing what I originally wrote, it's perhaps not immediately obvious that, without a valid reason for writing

&sub(@args)
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it would generally be preferable to write

sub(@args)
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Thankyou for raising this point and providing an opportunity for clarification.