Also (mostly) unrelated to the story, but the first thing I thought of when hearing about kinetic energy storage was a story I heard several years ago about a d

Also (mostly) unrelated to the story, but the first thing I thought of when hearing about kinetic energy storage was a story I heard several years ago about a data center that protected itself from catastrophic power surges by using a massive spinning flywheel to store energy from the grid and harvest its rotation to run a generator that powered the servers.