Whatsnew

Author: h-vetinari

doc/source/whatsnew/v0.24.0.txt

@@ -243,6 +243,8 @@ Backwards incompatible API changes
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 - A newly constructed empty :class:`DataFrame` with integer as the ``dtype`` will now only be cast to ``float64`` if ``index`` is specified (:issue:`22858`)
+- The `.str`-accessor does not work for anything other than string data anymore.
+  Any other uses (like ``bytes``) were never intended to be used and purely due to limitations of dtype checking (:issue:`23011`, :issue:`23163`)
 - :meth:`Series.str.cat` will now raise if `others` is a `set` (:issue:`23009`)
 
 .. _whatsnew_0240.api_breaking.deps: