Even if the airlines tried to do this….
View: https://m.youtube.com/watch?v=oAHbLRjF0vo&pp=ygUgSGl3IHRvIGxvYWQgYW5kIHVubG9hZCBhaXJwbGFuZXM%3D
…the passengers wouldn't follow instructions.
Agreed…
What I'd rather the airports do is use more than one door, like with the A380 below.
View attachment 769216
But instead use bridges/fingers at one fore and one aft door. Like this.
View attachment 769218
It's inefficient to have passengers at the back of the plane walk all the way to the front of the plane when there's a door at the back of the plane. Like Ryan Air below when loading with stairs.
View attachment 769217
Why Don't More Narrowbody Planes Use Multiple Doors To Board?
simpleflying.com
They used to. I remember taking flights many years ago where they used multiple exists. As little as 10 years ago I took a KLM 747 from Chicago to Amsterdam and they used multiple exits.