I wish utilities were more open about this data. I would love to see if EVs have done a good job (or maybe too good a job*) flattening out the overnight demand curve. Back in 2012, Georgia Power evangelists were marketing this as a path to greater efficiency: The "base load" caters to minimum demand, and if the curve flattens out, the way I understand it, they can get rid of some of that temporary/spiking demand generation.

But that's not saying it's better for the environment. Here in georgia, my impression is that base load is coal generation, and the more expensive natural gas peaker plants are actually cleaner-burning? The desire for more data is to really just verify all these half-baked impressions in my brain.