Fair.  We organized the "first" one which really was about development and the project.  I went to conferences in the next years.  But at some point it was recycled content from the same speakers, with ever unaffordable prices.  I could not even afford the entrance to the conference where I live any more.  I was tempted by honey badger, but could not justify the expense for what it is.  A non-commercial developer oriented unconference would be good, because there's still a few problems to solve.