PEP 622: Why the match statement is the correct feature right now (#1502)

pep-0622.rst

@@ -1769,6 +1769,24 @@ an expression. Nor do we propose a ``while match`` construct present in some lan
 with pattern matching, since although it may be handy, it will likely be used
 rarely.
 
+Other pattern-based constructions
+---------------------------------
+
+Many other languages supporting pattern-matching use it as a basis for multiple
+language constructs, including a matching operator, a generalized form 
+of assignment, a filter for loops, a method for synchronizing communication,
+or specialized if statements. Some of these were mentioned in the discussion
+of the first draft. Another question asked was why this particular form (joining
+binding and conditional selection) was chosen while other forms were not.
+
+Introducing more uses of patterns would be too bold and premature given the
+experience we have using patterns, and would make this proposal too
+complicated. The statement as presented provides a form of the feature that
+is sufficiently general to be useful while being self-contained, and without
+having a massive impact on the syntax and semantics of the language as a whole.
+
+After some experience with this feature, the community may have a better
+feeling for what other uses of pattern matching could be valuable in Python.
 
 Algebraic matching of repeated names
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