diff --git a/README.org b/README.org
index 55c8fd3..3d59ae0 100644
--- a/README.org
+++ b/README.org
@@ -683,6 +683,23 @@ But the framework for all of this is object capabilities.
 
 ** Must we boil the ocean?
 
+All this sounds fine and well, but we are pressed with a problem: we
+/already have/ ActivityPub implementations in the wild, and those
+implementations filled in the holes in the spec in the best ways they
+knew how.
+
+We do not want to have to throw away the network we have.
+As such, this document does not try to solve all possible problems.
+For example, a Webfinger-centric interface is roughly incompatible
+with Tor onion services, even if supporing such services would be
+desirable and could be more easily accomplished with a [[https://github.com/cwebber/rebooting-the-web-of-trust-spring2018/blob/petnames/draft-documents/making-dids-invisible-with-petnames.md][petname system]].
+As such, this document simply assumes that we will live with
+webfinger-based addresses for now, even if not optimal for the long
+term.
+
+Incremental improvement is better than no improvement at all, and
+there is a lot we can make better.
+
 * How to build it
 ** Object capabilities (ocaps)