I thought the actual purpose of the MOAB was as an upgrade to the Daisy Cutter, which was not for making super-loud booms to frighten the enemy into not fighting (as if that would work - "Eeek! I return to a life of peace and harmony!") but for crushing vegetation to produce helicopter landing zones.
While both the Daisy Cutter and the MOAB are pushed out the back of a cargo plane, the Daisy Cutter had to be dropped more carefully (and at much lower altitude) over the intended target spot because it couldn't steer itself. This made it unusable not only where an operational air defense system was to be found, but where hostile personnel with more pedestrian weapons were around. The MOAB fixed half this problem, I was led to understand.
If these bombs were meant to make helicopter landing zones, I'm not excessively concerned either has to be sent by a plane that couldn't be expected to pass through a working air defense system.
If these bombs are for use in places where there is lots of vegetation that needs a spot flattened out because there's absolutely nowhere decent to land a helicopter nearby, I'm not surprised our (I'm 'Mer'kin) time in Iraq has not produced any use of them.
The overmarketing of these weapons, of course, I believe happened. That's any marketing department, though, isn't it? Must be a number of engineers clutching their heads saying "That's never what it was supposed to do!".
Icon: sign warning that helicopters will be landing in your forest soon, and you're going to want to be somewhere else while some extremely intense hedge-clipping occurs.