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Changes between Version 1 and Version 2 of Ticket #15201, comment 6

-              v1
+              v2
 This leaves us with Carl's idea of "cache anything that doesn't have Vary: Cookie" — but is it even useful?
+Caching is hard!
+) Very few websites will match this requirement. Most websites indicate when a user is logged in. Many show a login form on every page for anonymous users, making anonymous pages depend on the cookie (because of the CSRF token).
+) Since it's purely HTTP-level, it could be done by a caching reverse proxy. For instance, Varnish seems [https://www.varnish-cache.org/docs/3.0/tutorial/cookies.html way more capable] of dealing with this than Django.
+----
+So, I'm +1 for deprecating this feature.