Maybe LFS can grow in the S3 if they put the open code for letting people upgrade it, or maybe not. The thing is, that in other games many people did very good jobs, for example Richard Burns Rally which is ,i believe, from 2003, is still played by many people, and the people made fabulous cars for the exception of the Group B class, because RBR programmers/developers or SCI didn´t let player-developers to do it.
I know is the infinite discussion, but maybe the community would help in S3 if they let us do it. All it need to be is a filter from the developers to say what is good and what is not. I think that it´s clearly obvious that they need help, but they don´t want it for whatever the reasons they´ve got.