As an illustrative anecdote, I spoke at Code Generation 2010 in Cambridge, UK on real world DIY code generation from found models in a normal software practice. The event was attended by people from the Object Group, who are responsible for UML. I used the phrase UML Hell as something to avoid in my talk, and it garnered much amusement and understanding. I was even audience rated near highest for a first time speaker in the history of the event and invited back to speak again... but it's a long way to fly from Asia! I don't use UML today, but encourage documentation and automated diagrams where appropriate.