User blog comment:Rozh/Surface-to-Orbit Artillery/@comment-189012-20110320185631

The only downside to any groundside weapon installation is that they are stationary. Of course, the best way to counter this is to conceal the location of the said installation. However, the only problem to this is that once you've fired up from that installation, your location would be revealed/exposed to the enemy. Of course, you could argue that surrounding the installation are counter-offensive defenses but those only delay the inevitable. As such, the concept of a MASOA would be a waste of resources. It's no better than having an ODP equipped with a MAC.

Of course, a Gauss-type defense designed to intercept enemy fighters/dropships/missiles/etc would be better and much more efficient but any larger/bigger would simply make it an expensive defense asset.