User blog comment:CzechOut/How Portable Infoboxes Can Change Your Style/@comment-168424-20160712020322/@comment-188432-20160712034758

As I've said down-thread, the point of the article wasn't to discuss the virtues of PIs, but merely to suggest some ideas about styling. The main reason I elected not to link to the Portability Hub is simply because that wiki does have a lot of information about why you should convert. It seemed, to my mind, a muddling agent rather than a clarifying one.

As for using your own personal user page to store some test CSS -- that's a great point. I can well imagine that it is very useful for people who are styling wikis where they don't have to "audition" it for others. I'm so used to having to share designs with multiple people at once that it didn't occur to me to note this more personal approach.