Although this change is backed by good reasons (see previous thread), the change seems to have significantly confused the less tech savvy admins on Fandom. Several have come here thinking all their CSS is gone or no longer working because they see an empty page when they click the CSS button on the admin dashboard.

What Andrewds said!

I wanted to change stuff on my infoboxes so that they are flexible to the change between light and dark theme (hard-coding color=#000 was not a good idea haha) just to find an empty css. Hella confused on how my css can be empty but my wiki still looking like it does, I used developer tool to see what's up. It told me yeah what are you on about, your CSS is here", and I saw my entries, so I clicked on it, but it brought me back to the empty CSS. So I was like okay f* it, I copy this stuff out of the developer's tool and put it in the empty CSS. Everything was still looking Gucchi afterwards so It seemed to have worked, but when I tried to change stuff finally it wouldn't register....so I came here to see what kind of sorcery was going on, and well...it's still working, but chances aren't registered because shit's on Fandomdesktop.css, which appears to also have priority, not on Common.css where everything is pointing towards now.

So what exactly did this do aside from confuse the shit out of people? You are pointing them to a different css page now...its not like you've just renamed the old one or moved it there, we have two different css sites now, and Fandomdesktop.css has priority so changing existing code does nothing when its already in Fandomdesktop.css~

Personally, I would say that making it point to Fandomdesktop.css was the original mistake, and changing it now to Mediawiki:Common.css indeed causes confusion, but it's unevitable and better done now than later.

MediaWiki:Fandomdesktop.css gets "priority" because it comes last, I would suggest you just remove any code from there and keep everything in MediaWiki:Common.css

I think they did it because in the transition period there were two css...one for Desktop and one for Oasis? That's my guess here. Still took me the entire night to figure out what was going on. Is there no way for FANDOM to move Fandomdesktop.css to common.css? or is that really something that we have to do ourselves?

Automatically doing so will confuse those who intentionally use both.

So both will stay available?

They do, it was never a question. The only change was where does the button on the Admin Dashboard lead to.

There has been no change to how the CSS pages are used by the wiki. The only thing that has changed is which of those pages admins are taken to when the use the button.