What tech does the AI not use and why?

[DirectorTsaarx]

Originally posted by AJC:
The Dominion Imperium gold AI uses some of these techs , like computer virus & allegiance subverters and boarding crews on boarding ships ( a really nasty combination) . it places MCs on ships to stop allegiance subverters, It also builds System gravitational shield facilties

Most of the unmodded AI's should use the System Gravitational Shield Facilities (at least in a game setup with "not all systems connected"). I've seen Organic AI's make pretty good use of organic facilities & Temporal AI's make good use of Temporal facilities. No experience with Crystalline, Psychic or Religious facilities, though...

I have not seen the following components used by the stock AI: tractor beams, repulsor beams, wormhole weapons, stealth armor, scattering armor, quantum reactors, emergency propulsion/resupply pods, or repair bays. I've seen ship yard components on bases, but never on a ship; and I've never seen a stock AI build bases on warppoints. I've also noticed that the stock AI always uses the "Small Rocket Pod" weapon on fighters, never using the small DUCs/APBs/MBs/etc; not certain whether AI's with racial tech will build better fighters - I have yet to see a racial AI use fighters at all...