The burden of proof is on you.
I showed that typical airplanes would need 500m2 of pv panels per passenger in order to fly, even with a perfect propulsion system and maximum solar irradiance.
You need to describe a functional airplane that somehow needs about 10 or 100 times less pv panels to fly.

there is nothing specifying its shape, size, battery capacity or even propulsion system.

Except laws of thermodynamics, that is.

Let's say that a solar plane is white, and a commercial airplane is black.
I bet that your "functional airplane" is still very much dark gray : you still need a pilot, copilot, food, toilets, a few luggage and minimum space for feet and belly.

it makes it very clear that it's entirely possible to replace our environmentally destructive planes with solar planes.

Once again : Not, it's not possible.
Here's a comment I posted 5 years ago : http://science.slashdot.org/co...
The laws of thermodynamics haven't changed much since.

If you try to access google.com from Germany, it automatically redirects you to google.de.
If you want the "original" Google from abroad, you need to type google.com/ncr.
This link should work the same all over the world :
https://www.google.com/?gws_rd...

that insures greater penetration

That's the right word.

The thing is, they really get bad symptoms from all this anxiety. Call it a self-fulfilling prophecy.
It's like those people in Ukraine that lives relatively close to Chernobyl.
Many think "Shitty life, too much radiation, we have no future". So they all drink, smoke, take weird drugs and live like there's no tomorrow.
The radiation isn't high enough to have any direct impact on their body, but they're doomed to die young nonetheless.

Or a slight variation :
you want to boot your laptop for a presentation in front of a few hundred people.
It's 8:50 in the morning, your presentation is at 9:00.
You get a nice blue screen that tells you "Please wait till 30 updates are installed". Then you get "Please wait till 200000 files are updated".
It often takes more than 30 minutes to do so.

It depends on the mentality.
In Germany, you pay the county dump to take your stuff.
In Italy, just a few hundred kilometers away from Germany, the county dump pays you to take your stuff, because they know that nobody would use it otherwise.

It's hard to reason with homeopathic lovers.
Depending on the dilution, you can prove that not a single molecule of the supposedly active stuff has been sold, ever :
https://en.wikipedia.org/?titl...

Yes, now we begin to agree.
It's true that we could live sustainably, provided we stop using cars and planes for everything, we live in smaller flats, we eat local and seasonal food, and stop buying so much crap.
Even though we could, the real question is if we ever will do so before it's too late.
The heavy smoker could also stop smoking any day in theory. But in practice?

I hope you're right for the demographic curve. I'm not so optimistic. WW2 didn't change much the demographics curve for example. You really need a shitload of famine/war/drought to kill a few billion people.

I'm talking about a sustainable society. There's not much sustainable about the way we do things right now. It's still too early to say if those people were indeed wrong when they said that it's not possible to feed 7 billion people.

Heavy smokers also tend to think that risks are grossly overestimated, and that there's no problem in smoking one pack a day for 30 years. 5 years later, many are dead after a long and painful illness.

Back to the original point : it's just not possible to sustain 15-20 billion people on Earth. Time will tell if 7 billion are even possible.
Moreover, you cannot extrapolate Israel example to the whole world. This country gets a lot of support from the USA and Europe, and doesn't see anything wrong with colonization.

We have plenty of oil, or did you miss the current drop in price?

Yes, a price drop automatically means there will be enough oil for everyone forever.
It has nothing to do with OPEC setting prices and the US destroying their environment in order to get the last few drops available.

As for Israel : https://en.wikipedia.org/wiki/...
I guess I know where a big part from the other 50% is coming from.

note that 114x background rate translates to ~225 species going extinct per million years

No. You don't seem to understand this E/MSY unit.
If you consider that there are 10 million species on earth (I agree with you, this number is a guesstimate, it could be off by 1 or 2 orders of magnitude), 225E/MSY would imply approximately 2250 extinctions per *year*.
If you consider just one species, it would go extinct 225 times over in a million years. In other words, its survival expectancy would be about 4500 years.
Shit, how old is our civilization?