We use it at my library/archive to convert EADs (XML finding aids) into something we can present to a human.

This change breaks something that's been working for us without issue for over a decade, and it's personally a PITA because I'm the only dev-adjacent person in the library and fixing this takes me away from other stuff. (I'm spread thin and we've been in a hiring freeze for 5 years. I love my coworkers but there's so much work stuff I have to deprioritoze in order to do the important stuff, it feels unfair when a big corporation decides to break something on me.)