The moment of inertia on that upper deck is going to snap those seats like a twig. While I’m sure there’s airline execs foaming at the mouth and lobbyists pushing wheelbarrows of money, I’ll drive before I get in one of those.

Also, more passengers plus less overhead bin storage means less cargo hold capacity, meaning air cargo (a valuable income stream, particularly on transcontinental or transoceanic flights, where the widebodies would be most used) would be cut back by more checked bags. And more discontent by pax that now have to pay for checked bag fees.

I dunno, I just don’t see the benefits.