memoryviews will stay

docs/caveats.md

@@ -20,3 +20,10 @@ Note that YOU, when sending messages, should not use memoryviews. Pass proper by
 as required.
 
 _AMQPError_'s returned to you via futures will also have memoryviews as _reply_text_!
+
+It was considered whether to unserialize short fields, such as _routing_key_ or _exchange_, but it was decided against. 
+Creating a new memoryview carries at least much overhead as an empty string, but there's no need to copy.
+Plus, it's not known whether you will use these strings at all!
+
+If you need to, you got memoryviews. Plus they support the \__eq__ protocol, which should cover most
+use cases without even converting.