I dont know if this was suggested before (I didnt find something) and I dont know if it is a bit to specific
BUT
What about lounges as a seat configuration or ifs option.
I know that this is only possible for older airlines cause today its not really a thing anymore.
But I think it would give it a bit more charme to have a old widebody like the DC-10, L1011 or 747.
I dont know if Iam alone with that idea or if there are others who like this.
Really interested what you think about it. ^^