Is there something going on with them that I didn't see?
As far as I could tell, for pure machine empires you could produce energy credits directly by just using a region, or you could produce them indirectly by using multiple regions, a bioreactor building, and possibly more buildings to assist in food production.
It didn't seem to make sense to devote one or more buildings towards producing energy through bioreactors when you could just devote one building to make your energy districts more effective.
The only way I can see the bioreactor becoming better is if machine empires were able to use the galactic market to trade for food when it was cheap, but they can't.
As far as I could tell, for pure machine empires you could produce energy credits directly by just using a region, or you could produce them indirectly by using multiple regions, a bioreactor building, and possibly more buildings to assist in food production.
It didn't seem to make sense to devote one or more buildings towards producing energy through bioreactors when you could just devote one building to make your energy districts more effective.
The only way I can see the bioreactor becoming better is if machine empires were able to use the galactic market to trade for food when it was cheap, but they can't.