I failed to land my point, it’s that instead of chasing small and complex battery systems to put in cars, lower tech, bigger, less convenient battery tech of the pool-under-house scale, could be an incredible option. Stationary batteries don’t have the same constraints as the portable batteries we are familiar with from even before the lithium ion age.
Kind of like there's no reason we can't go to Mars for tourism. Just make it as convenient, safe, and cheap as a jet to London.