This is a decent form of energy storage in real life, and the cables are also good. But consider how it is compared to this game. We already have the ability to store ludicrous amounts of energy in MFS units. We already have near perfect conductors that are very costly (glass fiber cable). And if you want to talk realism, consider how flywheels are a VERY high tech form of storage, and their energy density is so poor that only experimental ones in research labs can store a significant amount of energy. The commercial ones store no more than batteries.
almost less than battieries. The amount of storage they hold is enough to hold stuff over for scant minutes. Just long enough for the generators to kick in.
Their big advantage is there aren't costly Sealed Led Acid batteries to replace every 3-5 years like in a UPS