I agree. Also wanted to add a bit more color. When I did my MBA, we visited Emirates, and I heard a cool story. Apparently, international airports limited the landing slots that Emirates could use. Emirates then pushed Airbus to create the A380 so they could maximize passenger volume per landing slot. I'm sure this is only part of the story, but it's a pretty cool angle and a creative response to a business reality :)

I think high-efficiency twins and ETOPS (https://en.wikipedia.org/wiki/ETOPS) standards certifying twins for transoceanic flights have contributed to the reduced demand for four-engine jets.

I will miss the B747 (and yes, I love airplanes).