popkin16

I've thought about this too, and it's possible the city does have a cache of them. The city is the size of Manhattan, which means it's entirely possible the Atlantis Expedition simply hasn't discovered where they're kept. The database is vast, after all, so it would take a long time to find the right information. And when the Ancients took control of the city and kicked the expedition out, they activated a bunch of systems and didn't seem worried about power requirements, so.

But TPTB dropped the ball so many times. What happened to Sora the Genii? What was that giant wraith beam we saw attacking the village in Letters from Pegasus? Who made the nanite virus (though I hear this was retconned and blame was laid at the replicators feet)? What happened to the four other ZPMs old!Elizabeth listed?

While having no answers is frustrating, it does give room for fanfic authors to explore!