$2.1 Billion - That is how much IBM paid for the acquisition of Rational Software in 2003. The "Three Amigo's" (Grady Booch, James Rumbaugh, and Ivar Jacobson)

$2.1 Billion - That is how much IBM paid for the acquisition of Rational Software in 2003. The "Three Amigo's" (Grady Booch, James Rumbaugh, and Ivar Jacobson) had different modelling methods and decided to "Unify". Most the the UML hype was about adoption and market penetration in order to get to an exit. Others were caught up in the hype and made some money too, such as Martin Fowler, who wrote UML distilled and went on to agile and Thoughtworks. Special mention to the now-unknown Alistair Cockburn who wrote a book and did a lot of consulting around the confusion of use cases. In today's language, Rational Rose would be the "Uber of Enterprise Modelling" and UML and RUP would be it's moat. Or something - Hacker News would be very congratulatory of their achievements. The question is less about why we don't use UML anymore (A: the three amigos got their exit), but why nothing has come along to replace it (A: it's not needed).