Well, if you're going to be that picky, exit isn't the only function that can be overriden.

use strict;
use warnings;

BEGIN { *CORE::GLOBAL::die = sub {
   print(STDERR @_);
   CORE::exit($! || 255);
}; }

eval { die };
print "You can see I'm still alive!\n";  # Never reached
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All bets are off when you start overriding functions, so your nit is pointless.