Maybe a business, certainly not the average person. And whether or not they use it will be determined by price more than anything. If the added batteries and renewables don't translate to appreciable decreases in energy prices then I don't see people using more electricity just because it's available.

The other thing that prevents an individual from using more is that electricity usage creates heat.

Of course. It just means the estimation of "years of battery production" (and its implicit "we can't possibly produce that much so the transition is doomed to fail") isn't as big of a deal as it might seem at first glance.