The group of repos also is an alternate 4chan.
I have no clue about the code, haven’t looked, but it has consistent work done and some people use it. In this context, I would feel less good about the code if Pepe was not in the picture
Word press code, and plugins, do not sanitize out of the box. You have to call an additional function, each time, that is not provided automatically. Many home made plugins miss that; many popular plugins used to be home made ones
Legacy systems still handle more traffic than modern ones, I’d wager
Smells like non technical reasons