Airlines decide on their 777 interiors and entertainment centers, so your experience on a Delta 777 will be very different from an air Singapore one. The 777 was a huge advance in composites, which were continued in the 787. My gf at the time dad worked on the plane and was very proud of it.
The 737 has been updated many times and Boeing hasn’t seen the need to introduce a completely new narrow body. It is still very successful, so I guess they are right. In contrast, the 767 was dying and needed replacing by the 787, it couldn’t be updated.
The 747 is still in production and is very successful in freight and other applications. It isn’t going away anytime soon.
The 737 has been updated many times and Boeing hasn’t seen the need to introduce a completely new narrow body. It is still very successful, so I guess they are right. In contrast, the 767 was dying and needed replacing by the 787, it couldn’t be updated.
The 747 is still in production and is very successful in freight and other applications. It isn’t going away anytime soon.