Why doesn’t a twinjet double decker airplane exist?

Question

I read an article about the Airbus A380 (Let’s call it an A380 from now on) and why the production of A380s ended. The article cited 2 reasons for end of production of A380s: Point-to-point transit is more common in aviation nowadays, which didn’t make sense for me because, in reality, most airlines (With the exception of some budget airlines) use hub-and-spoke transit instead; And the fact that the A380 is a quadjet, which makes because twinjets are cheaper for airlines and ETOPS exist. With both the A380 and the Boeing 747 out of production, twinjets (The Airbus A350 and the Boeing 777X in particular) have taken over and they sadly, however, have only one deck, and that explains the title question. Sorry for the post being long

In: Other

Answer 1

Wider planes are better because the body can produce lift. Taller planes cannot.

We are more likely to see wide body planes than taller (double decker) planes because of this