diff --git a/doc/differences-from-component.md b/doc/differences-from-component.md
index 58da84a..deb1376 100644
--- a/doc/differences-from-component.md
+++ b/doc/differences-from-component.md
@@ -170,6 +170,8 @@ the app, states need to be `:require`/`:use`d, which is usually done within the
 Depending on app dependencies, it could only require a few states to be `:require`/`:use`d, others 
 will be brought transitively. Here is an [example](uberjar.md#creating-reloadable-uberjarable-app) of building a wepapp uberjar with Mount.
 
+On the flip side, Component _system_ usually requires lots of `:require`s as well, since in order to be built, it needs to "see" all the top level states.
+
 ###### _conclusion: it's simple in Mount as well, but requires an additional step._
 
 ### Multiple separate systems