diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index ad6c01d..1112898 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -4,6 +4,8 @@
 
 Marking posts and replies as sensitive content is now possible.
 
+On output, use shared inboxes on instances that support it. This reduces bandwidth usage greatly, specially for very popular users with thousands of followers.
+
 Much more aggresive HTML sanitization.
 
 **disabled by now** On OpenBSD, use the `unveil()` function.