Greetings to our dear and beloved Joomla community, how are you doing? How's the weather?
It's summer outside my window, and summer is a great time to update one’s extensions.

That's what I decided to do and encountered a number of issues related to plugin triggers.
Overall, I liked the idea that in a system plugin I could enjoy using it, but not all new triggers are available in Joomla 4, some just don't exist, and others are not accessible from the system plugin in Joomla 4.

It's particularly disappointing that in Joomla 4, unlike Joomla 5, I can't add authentication functions to the system plugin, and I really wanted to be able to access client sites in the shortcode plugin.

But I'm getting ahead of myself, my apologies, let's get to the specifics.

About the triggers:

1. onUserAuthenticate - Is it planned to make this available in system plugins in Joomla 4?
2. onUserAuthenticate - Is there a plan to replace the arguments in the trigger with AuthenticationEvent? As it stands, I have to maintain two implementations in one plugin with a Joomla version check.
3. onEditorButtonsSetup - Is there a plan to add this to Joomla 4, as currently, I have to maintain a plugin on Joomla 3 architecture for compatibility in Joomla 4. Whereas in Joomla 5, I can use onEditorButtonsSetup right in the system plugin.
4. Languages. There are two issues here.
   4.1 Is there a plan to add a ->getLanguage method or generally a language trait to CMSPlugin in Joomla 4?
   4.2 Is there a plan to fix the issue with connecting languages?
   When Text:: uses Factory::$_language but according to the new standard, languages need to be loaded in Factory::getApplication->getLanguage()?