Aahz requested that the principal objection be clearly identified.

pep-0322.txt

@@ -104,6 +104,15 @@ __getitem__() and __len__() but still have some useful way of
 providing reverse iteration.
 
 
+Discussion
+==========
+
+The case against adoption of the PEP is a desire to keep the number of
+builtin functions small.  This needs to weighed against the simplicity
+and convenience of having it as builtin instead of being tucked away in
+some other namespace.
+
+
 Real World Use Cases
 ====================