did some research on the 'Pointless LMG'
Firstly (as some of you have stated) Its a damn mini-gun, so clearly your volume of fire is going to be more. Sure the negative connotation is that it uses more bullets in a burst or in suppressing fire, but that's also more targets / object to get chewed up by the little monster.
That brings me to my second point...as per rules / guidelines for a mini-gun: (Arsenal book, Pg.30) "Mini-guns impose a -14 dice pool modifier on the attack roll. A narrow burst applies a +14 DV modifier to the attack, while a wide burst applies a -14 dice pool modifier to the defenders dice pool."
I would argue that this weapon is not pointless at all and I can understand why you have to dish out the extra cred. I'm not saying every street sam should walk around with one, however, if you have a turret on a vehicle and the opportunity to...why wouldn't you?
Heres a cool guy video showing SWWC and a minigun:
http://www.youtube.com/watch?v=1F2OX7xtSZo