I never understood why people who have more than minimal CSS skills use a text box in a themes settings to add CSS. You lose having a local copy but more importantly you use the convenience of editing in your IDE or even in a simple text editor with some formatting. CSS text boxes are for people who have problem connecting with ftp and usually those people barely know CSS so sure, some basic users with a basic site might benefit from it but in no way should a discussion of this becoming a standard make headlines.