This is good advice. After 26 years of working in this field under stress that makes an air traffic controller look like a librarian, it has finally taken a big toll on me.
Sure, we'll use the embargo clause to explain this. The real reason is that, when you have machines capable of making new machine parts, you want to know when they move around and start building Skynet.
These boxes have internal slots for 45 blades. The current generation blades are Atoms and run a variety of Linux OS offerings. Future blades will be geared towards memcache, GPU, and other types of clusters. I got a couple of these at work for eval a little while back, and it's a pretty interesting package.
Only good reason I can think of is where multiple shots are required to weaken / overcome some kind of hardened defense. Of course, these things will be firing some kind of armor piercing / explosive / incendiary round, so that may not be a requirement. Or unless the psychological effect of a spray of highly-accurate bullets warrants the barrage.
It actually is, since a machine is more likely to keep an automatic weapon on-target than a human being is, just because of the shear strength required. If a machine is firing at me from over 600 yards away with a large-bore rifle, there's not a lot I can do about it as a human unless I have a rocket launcher of some kind. And then only if I'm very, very lucky.