I lead a team that manage trade settlements for hedge funds; data is exported from our systems as XML and then transformed via XSLT into whatever format the prime brokers require.

All the transformed are maintained by non-developers, business analysts mainly. Because the language is so simple we don't need to give them much training, just get IntelliJ installed on their machine, show them a few samples and let them work away.

We couldn't have managed with anything else.