I think that saying “the extra scope is almost always overkill” is a little disingenuous—your second example only works1 because of the extra scope. Specifically, if you tried to unroll this for loop, then you'd have to either think up a bunch of extra names, or get warned.

1 By which I mean, only works silently under warnings.
UPDATE: Despite typing it out myself, I didn't register the ‘almost always’, and so was reacting as if the statement was unqualified. I'm sorry about that.

In reply to Re^4: anonymous scalar reference by JadeNB
in thread anonymous scalar reference by dharanivasan

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