I did not regret my decision (far from it), as Dvorak is indeed nice to type and quite readily available out of the box.
Normally you don't get much benefit from switching layouts though. Especially as developer. As an author or someone who is writing prolonged texts in plain English, yes it's definitely an advantage. Yes, it's also more fun to type. But really, QWERTY is good enough in most cases. You don't really need to bother.