Index: libcxx/docs/ReleaseNotes.rst
===================================================================
--- libcxx/docs/ReleaseNotes.rst
+++ libcxx/docs/ReleaseNotes.rst
@@ -37,8 +37,23 @@
 
 New Features
 ------------
+- Localization support has been made optional. It's enabled by default and can
+  be disabled by building libc++ with ``-DLIBCXX_ENABLE_LOCALIZATION=OFF``.
+  Disabling localization can be useful when porting to platforms that don't
+  support the C locale API (e.g.  embedded). When localization is not
+  supported, several parts of the library will be disabled: ``<iostream>``,
+  ``<regex>``, ``<locale>`` will be completely unusable, and other parts may be
+  only partly available.
+- Several unqualified lookups in libc++ have been changed to qualified lookups.
+  This makes libc++ more ADL-proof.
+- The libc++ implementation status pages have been overhauled and look much
+  better now.
+- More C++20 features have been implemented. Especially the implementation of
+  the various ``constexpr`` papers made a lot of progress. :doc:`Cxx2aStatus`
+  has the full overview of libc++'s C++20 implementation status.
+- Work has started to implement new C++2b features. :doc:`Cxx2bStatus` has the
+  full overview of libc++'s C++2b implementation status.
 
-- ...
 
 API Changes
 -----------