The H2 infrastructure is TINY !! H2 is also very explosive, and I would not want to be sitting on H2 high pressure tanks in a very vulnerable automobile.

We've been hearing this tune for almost a century. The engine produces cleaner emissions than an ICE, but that's pretty much the only advantage. Producing the hydrogen isn't any more efficient than producing electricity with a solar panel. Given how far behind hydrogen refueling infrastructure is compared to ev recharging stations and how difficult it is to produce and store safely, fuel costs would be a lot more expensive per mile than electric, likely even more expensive than petrol (for perspective, with 75-80% eff charging electric is roughly 3x cheaper than petrol across the board at an avg 12 cents/kWh). Production cost and inefficiency, lack of infrastructure and the numerous complicated supporting systems built into the engine just to make it run (more so than a conventional ice) are what make this not only a weak contender against electric, but simply impractical any time in the next couple of decades. The same things that make hydrogen fuel cell cars impractical. All they're doing is taking the fuel cell out. I'm sure laymans think engineers can just wave a magic wand to make hydrogen a practical solution, but nothing's changed. There's been no big breakthroughs in any regard. Toyota just made a hydrogen powered car. They're not the first to do it, and they won't be the first to be disappointed by the fact that marketing doesn't change physics. Joi Scientific also thought it would, and it cost us tax payers tens of millions of $ for nothing but embarrassment. When the vehicles are on the road, the fuel is affordable and there's enough refuelling stations/storage to compete with electric, then I'll change my mind. Until then, this is just Toyota playing Elon Musk. Still waiting for that cyber truck, hyperloop, etc.....

why dont they just reinvent the water engine that someone made and got murdered for

Is it another interference engine that becomes USELESS when the NEW TIMING BELT BREAKS ON A 0° F morning?

Toyota has made a grave miscalculation. Electric will prevail, Tesla is too far ahead in charging infrastructure and people will always be leary of driving atop a hydrogen bomb -- like it or not, that is the prevailing perception. Too little too late Toyota.

This is a lot about nothing. The efficiency will never match an electric motor, there are more moving parts to service, you still have to go somewhere to fuel up, & the cost of Hydrogen at a pump is about the same, or slightly more than gasoline, if you even have pumps where you live. Hydrogen as a personal transportation fuel & technology is a dead issue. It takes 3x the energy to produce green hydrogen as it would to just put that electricity into the grid. Once you charge from your driveway & leave your house with “a full tank” every morning, driving to a pump to fill up from someone else who is dictating the cost of fuel will seem archaic! Average cost to power my car last year … $2.30/day. Service costs … $100.00! There is no comparison to ice, fuel cell, or H2-ice.

Nokia part 2

Toyota's CEO is still dreaming.