The world is changing but at the moment that electricity largely comes from burning fuel. And if it makes sense to mine fuel when the payoff is X, then if still makes sense when the payoff is X + something (as it is when efficiency improves).
It is a very safe assumption that Jevons's paradox applies to electricity consumption, there is no need to show it. Take a look at US coal production [0]. There is no evidence there that energy use from coal will decrease with improved technology. That is 150 years of technological innovation and we're basically seeing a linear uptrend in use. If domestic use levels off there will be exporting. That production is not going to go down without an uneconomic political intervention or literally running out.
Now I'll agree that Jevons's paradox does not apply to everything [1]. But energy in general and electricity in particular it is painfully obvious that there are more potential uses than there are efficiencies in the world. Give me cheap enough electricity and I can do anything; its use will not be suppressed by reducing need for it in specific cases.
[0] https://en.wikipedia.org/wiki/Coal_mining_in_the_United_Stat...
[1] Also my name isn't Bob.
