I would be happy to review a PR that removes the sentence altogether I am ready to prepare PR, but I don't have permissions to push 
Update javadoc of `Strictness.STRICT_STUBS`
https://github.com/mockito/mockito/blob/c4cce85decc1639db41209696131d41e6d722d2f/src/main/java/org/mockito/quality/Strictness.java#L68

https://github.com/mockito/mockito/blob/c4cce85decc1639db41209696131d41e6d722d2f/src/main/java/org/mockito/MockSettings.java#L371

It looks like despite of the plan, `LENIENT` is still the default in version 4.
src/main/java/org/mockito/quality/Strictness.java
src/main/java/org/mockito/quality/Strictness.java
diff --git a/src/main/java/org/mockito/quality/Strictness.java b/src/main/java/org/mockito/quality/Strictness.java
index b25cab33e6..76cd552b38 100644
--- a/src/main/java/org/mockito/quality/Strictness.java
+++ b/src/main/java/org/mockito/quality/Strictness.java
@@ -65,7 +65,6 @@ public enum Strictness {
      * Ensures clean tests, reduces test code duplication, improves debuggability.
      * Offers best combination of flexibility and productivity.
      * Highly recommended.
-     * Planned as default for Mockito v4.
      * Enable it via our JUnit support ({@link MockitoJUnit}) or {@link MockitoSession}.
      * <p>
      * Adds following behavior:
