[TASK] Add remark about plugin grouping in SwitchableControllerAction RST

Resolves: #91091
Releases: master
Change-Id: I88c8c7c7119d7dae485eb6013ce05aaee42145d7
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/64213


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Richard Haeser <richard@maxserv.com>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Richard Haeser <richard@maxserv.com>

typo3/sysext/core/Documentation/Changelog/10.3/Deprecation-89463-SwitchableControllerActions.rst

@@ -91,4 +91,18 @@ This configuration would lead to the creation configuration of two different plu
         ]
     );
 
+
+Advantages of Separate Plugins
+------------------------------
+
+When using separate plugins for each switchable controller action combination,
+it is possible to properly define which action should be cached.
+
+In addition, TYPO3 v10 LTS allows to group plugins in FormEngine directly
+to semantically register various plugins in one specific group.
+
+See https://docs.typo3.org/c/typo3/cms-core/master/en-us/Changelog/10.4/Feature-91008-ItemGroupingForTCASelectItems.html
+for more details.
+
+
 .. index:: FlexForm, PHP-API, TypoScript, NotScanned, ext:extbase