Well it's not replacing one with the other. It's creating competition between them, which in so doing weakens each one.

We also don't need cars at all. Or computers. Or even electricity. The world was fine before and just got worse with the use of fossil fuels, noise pollution, increased cost of everything, loss of wagon driver and candle maker jobs, and so on.

How is it a 'feudal lord'? These are local models.