777x is probably the future of this segment. Larger planes simply cannot scale because they already have to have short wings to fit in airports. Folding wings (like the 777x) can address this. Longer, higher aspect ratio wings are one powerful way to continue the march to higher efficiency. Eventually, I think this will allow electrification of most air travel. And I do think that supersonic air travel will make a st…
> We're also becoming richer as a species. I don’t understand this. Isn’t richness/poorness relative to something else in the same pool? What other species are you comparing us to? Because it’s a zero sum game otherwise; a pie chart where percentages count but can be scaled up or down without effect.
Quality of life is not a zero sum game. If you want to be quantitative, one could deploy a proxy metric like the Kardashev scale [1].