The (still) poor energy density of EV batteries is an issue, Toyota repeatedly has stated. A Tesla Model 3 holds a 500 kg battery pack, 6-8 times the weight of the usually only occupant (the driver), to give it a range of a regular ICE car. No wonder that Toyota is aiming to boost energy density via a solid-state battery. It is still hanging in there according to recent messages: https://twitter.com/NextGenEV/status/1684153472701308928