Battery cars are relatively
Battery cars are relatively simple vehicles, which is why a century ago their development preceded gasoline cars. Though they came a long way since then, battery cars still need to be charged, and with raw power made elsewhere. Such is not the case with hydrogen cars -- or gasoline cars for that matter -- which make their power from the fuel they carry onboard. Automotive engineers took this nagging fact into account, and took into account also the finite capacity of our electric grid. They rightly concluded that there is an inherent limitation with battery cars -- one that does not go away with high capacity batteries or with fast chargers.
This might explain why 62% of automotive executives believe battery-powered cars will fail and 78% believe hydrogen fuel cell cars are the future.