When they are going to insert double trailers in multiplayer, for years the developers show videos in the trailers, but they are not inserted into the game, I think they should create a server only to play with double trailers with some restrictions.
Whoever wants to play with the doubles would enter a server and whoever does not want to play with the double trailers plays on another server normally
Video: Https://www.youtube.com/watch?v=f-TNFMyk6JE
https://www.youtube.com/watch?v=tNIn_P8wxmw