TYPO3 Core

I would suggest to deprecate the following page TSconfig:

mod.SHARED {
    defaultLanguageFlag
    defaultLanguageLabel 
    disableLanguages
}
mod.web_layout {
   defaultLanguageLabel
}

Each of them is marked with
Note that this option has largely been superseded by site configuration since TYPO3 10 and will only work in the Backend for a “NullSite”. For instance a global sysfolder in the page tree without an attached site configuration. Once a page tree has a site configuration, the default language icon is set from the site configuration’s language settings and this option will have no effect at all.

Do we need these rare edge cases? And if so wouldn't it be better to have some kind of null site configuration to be used when no other one is defined?