Want what he wants? Sure. I want to take off from my backyard and go soaring. I'll settle for driving to an airport, since I have neighbors and only 3 acres and the prevailing winds locally point me towards tall trees, or power lines, or a house... and while I want to take off from my back yard, the times it would be safe are few.
And I'm not anti-Hydrogen, at all. I'm practical. There isn't anyplace to fill up. Might as well run on unobtanium. If you live in LA or Vancouver or NYC, then I would do the calculations to see if I could afford to pretend I'm Green And Righteous.
And it's a pretense. Pretty much any source except Nuclear & Electrolysis is going to pollute more than just using gasoline. And since there isn't a Nuke Plant in commercial operation in my country that uses technology newer than my old bones, there's the problem of waste. Never mind Congress passed laws years ago to recycle & store this stuff, it never got funded, the safe storage was blocked by NIMBY Congresscritters. ( just like there's no offshore windmills in view near where other NIMBY Congresscritters have beach mansions. That they are some of the most corrupt and dishonest scum in the hemisphere is irrelevant. )
When/If they start a major effort for Thorium salt Safe Reactors and maybe solve some of the horrible pollution problems of Solar & Wind & the Severe Problem of Intermittent unreliable expensive and short lived gear involved, THEN I can drive a plug in, or Hydrogen vehicle without hypocrisy.
Doesn't mean I don't just live with the hypocrazy Now.
My Mother has a plug in Prius Prime, and went a year without adding gas. ( actually a bad thing ) And she runs the car on Nuclear or Water/gravity, or sometimes garbage. ( local power companies ) As far as she's concerned, it's just fine she doesn't ever have to stop for gas, and doesn't mind plugging in the car after a drive. She's never used another charging station outside her garage.
I chose not to get a plug in. Never mind the dying natives near the mines. I don't have a garage and don't want to spend the extra 8-10 thousand dollars. So I got a "regular hybrid" and treat it like a gasoline car. ( which it is )
The Good news is I'm learning how the systems work, and getting over 40 mpg in a fairly practical and sporty hatch is great.
The Bad news is that the Really Nifty drivetrain is probably a horrible match for airplanes. The Planetary Gearing is at heart just like the nose on a P&W R2800! Cool! But a very different system is needed for practical aviation. Either a "Range extender" serial gizmo for an electric, or the hybrid Rotax is developing.