A few companies had built extremely compromised electric vehicles (Leaf, e-Golf, etc) with anemic range. No one built a 200-300 mile range electric sedan with the best in-class performance and best safety features seen in an auto to-date. (speaking of crash safety, not Autopilot).

Asking how much energy the on-grid batteries have saved is a non-sequitur. That's like asking how much energy Tesla automobiles have saved. Probably very little, but that is irrelevant in the grand scheme. The short-term (1-2 yr) question of energy saved doesn't matter. The long-term (10-50) question of "is this pushing the entire industry in a better direction" is the important question. I think it is Yes for on-grid battery storage, as it is Yes for Tesla automobiles, as it is Yes for reusable rockets for space transit. Must take the long view.