Thread:Support/RTL.css and the RTL gadget

Now that wgBetterDirectionality is enabled here, is there still need for MediaWiki:Rtl.css and the RTL gadget that can be enabled in the preferences?

I used to have the RTL gadget enabled, even though i never really understood what exactly does it do. I disabled it after wgBetterDirectionality was enabled and it solved several issues.

If MediaWiki:Rtl.css does the same thing here as in Wikimedia Commons, then it is most likely not needed either.