Dont think this is the right way of looking at it.

Two things were happening at the same time: deindustrialization and electrification. Industries and the economy used to depend more on machines and oil. That was getting replaced by reliance on electricity. If electricity generation was cheap enough, we might have seen the total energy usage get transformed one for one into electricity usage. But that didn’t happen and energy usage overall went down. That’s deindustrialization.

Of course it could have other reasons like labour costs and so on.