First transatlantic flight with sustainable fuel. Is this the future of flying?

The only sustainable fuel is hydrogen from water using electricity from fast breeder reactors. Biofuels are simply stupid.

I must add that there always be a limited role, much smaller than it is now, for fixed and rotating wing aircraft, to reach places where dirigibles cannot land. In particular for emergency evacuations from places only accessible with such machines, as well as for taking people to hospitals and delivering necessities to families living in isolated places, as bush pilots do today.

Thomas, you are quite right about synthetic fuels being helpful things to have, same as special culverts for wildlife to cross safely below train tracks on embankments. But overall, what you wrote would be an entirely correct proposition IF the world is assumed to inevitably have to work much in the same way as it does now and it has for some decades already. But I firmly believe the changes in climate will make that impossible. I agree that more authoritarian governments are likely. This may not be good, but it could be worse. That is the least of my worries: War for disappearing vital resources, both civil wars and wars between nations. And historical migrations, as have happened in centuries past, from places where people starve to those where they can eat (marching in, weapons in hand, as organized armies, not humbly begging for admission anymore) along with a possible, small at first, then growing and growing very quickly all the way to an all-out thermonuclear war is another serious probability. With more and more countries already having, or working hard to develop their own nukes. What I am proposing is that, instead of dying in many interesting if gruesome ways, we do *adapt* by taking things easier. There have been always those that need to travel frequently, and none that I have written precludes it. Less than a century ago people travelled across oceans by ship, that took one or two weeks, depending on the ocean, the route, the weather, etc, in communication with others by radio, and most necessary things got done. It is going to be faster than in those days with dirigibles and high-tech sail ships. And, between points accessible continuously by rail, with slower electric trains. Or does anyone believe, seriously, that modern life was impossible before long-distance flight on fixed-wing aircraft, or even before jets? (For those who do, there is always Mars. Don't wait, call Elon to book a one-way trip now! Not many places left, and those are going fast!)