diff --git a/guide/src/reference/arbitrary-data-with-serde.md b/guide/src/reference/arbitrary-data-with-serde.md
index 03161f30..9d1109f5 100644
--- a/guide/src/reference/arbitrary-data-with-serde.md
+++ b/guide/src/reference/arbitrary-data-with-serde.md
@@ -116,7 +116,8 @@ disadvantages.
 
 The primary advantage is smaller code size: going through JSON entrenches code
 to stringify and parse floating point numbers, which is not a small amount of
-code.
+code. It also supports more types than JSON does, such as `Map`, `Set`, and
+array buffers.
 
 There are two primary disadvantages. The first is that it is not always
 compatible with the default JSON-based serialization. The second is that it