This literally doesn’t matter. The energy consumption of a train is trivial compared to displacing cars. If there was a way to trade this savings for higher speed, ridership, or frequency, it would be worth it.
(If there’s not, this is a free win and yay - but it’s the wrong focus)
Both speed and frequency are significantly up, and I’ve heard ridership is as well. Also, noise and pollution are substantially down. A huge win all around.
(If there’s not, this is a free win and yay - but it’s the wrong focus)