diff --git a/_content/doc/effective_go.html b/_content/doc/effective_go.html
index 9b4eea2..6104d3a 100644
--- a/_content/doc/effective_go.html
+++ b/_content/doc/effective_go.html
@@ -34,6 +34,24 @@
 should read first.
 </p>
 
+<p>
+Note added January, 2022:
+This document was written for Go's
+release in 2009, and has not been updated significantly since.
+Although it is a good guide to understand how to use the language
+itself, thanks to the stability of the language, it says little
+about the libraries and nothing about significant changes to the
+Go ecosystem since it was written, such as the build system, testing,
+modules, and polymorphism.
+There are no plans to update it, as so much has happened and a large
+and growing set of documents, blogs, and books do a fine job of
+describing modern Go usage.
+Effective Go continues to be useful, but the reader should
+understand it is far from a complete guide.
+See <a href="https://github.com/golang/go/issues/28782">issue
+28782</a> for context.
+</p>
+
 <h3 id="examples">Examples</h3>
 
 <p>