As other have said, planes like the 747 and A380 are being retired and/or phased because of the fuel cost of running four engines vs. two over the same distance.
Another reason, which Boeing figured out long before Airbus did, is airlines were abandoning the spoke-and-hub route system in favor of the point-to-point routes so smaller twins (think A321) are more efficient/economical over those shorter flights which by defintion carry fewer people. Boeing was going to build a competitor to the A380 but abandon it when they figured that out.
Some shots from the first 747. It was used for a lot of testing thus the stripped interior.


The upstairs lounge:


Of all the areas in the plane, I think the cockpit is the worst looking area! The cockpit seats look VERY worn out!!
Thank you for showing this plane!








