Because there are other things to consider besides efficiency. You don't just swap out your stack on a whim, because you lose other things like experience. Ther

Because there are other things to consider besides efficiency. You don't just swap out your stack on a whim, because you lose other things like experience. There are probably people up there who can fix a diesel generator in a snowstorm blindfolded using a part they had in their garage from 10 years back. They could probably fix a wind turbine. But probably isn't the word you want when your whole town is dependent on that power source. So you start small, fix the problems that will arise, gain a knowledge base, and THEN move on to bigger things.