User blog comment:DaNASCAT/Technical Update: June 12, 2017/@comment-3218221-20170613135028/@comment-3218221-20170613164058

HM100 - I suppose I could, but I'm not in the habit of using personal CSS/JS. I see no advantage (other than accessibility) for an administrator to make visual/functional changes that only affect their wiki experience and not their users'. If I'm to use my wiki, I will use it the way I present it to my users - if I use personal CSS/JS there is a danger of forgetting after a while that my custom experience is not the what the wiki is offering.