There is something incredibly satisfying about seeing steam dials on the internet.

...and has existed since May 2009.

Not only is the generation instrumentalized, but real time consumption by heavy electricity users (steel mills, rail operators and so) has been A Thing since the early 1990s. I know because I built very early versions of consumption dashboards* for the sales/billing department of National Power, one of the major UK generators.

* in fucking Lotus 1-2-3, of all things

And it has a link to the French version too.