Some shit still use XSL at my workplace, and once I got a task with them, so... I hit up some online resources and fixed the issue.
I kid you not, from there on, I was (and still am) the XSL guy and gave me more XSL designing and work.
I mean, it's not hard, a tiny little bit complex, but I really just spent half hour researching and some googling during work to complete these tasks, it in its own way makes sense.
But they just... aren't willing to maintain those XSLs, because they indeed looks really ugly and scary in a way.