Good things are not designed in this fashion. I'm sure everyone else in the aviation industry used the uml equivalent, I'm pretty sure the skunkworks teams do not.
It was hard for the skunk works teams to use UML for a long time since it was only published in the late 90's, but what makes you so sure they are not using it now? or do you have a survey of which "good things" are not designed in this fashion?
And besides what is the relative share of skunk works type teams from the overall software development market?
