power supply and demand is a rapidly evolving creature. what once was a potential issue is becoming less and less each day. the next challenge is what to do about energy storage. do we put all of our eggs in one basket? do we diversify using several solutions? do we wait for technology to catch up or for prices to drop? there is no clear cut answer at this point. although as far as having the capability to power rail it is a shrinking concern and should be a non-issue by the time rail ever gets going.