Tbh I’m on board with allowing these, and 5 part trailers, on the Sim 2 server. The people that don’t want to deal with these can just use the Sim 1 server. Another thing, their is a clause in the rules (I don’t know the exact number) that states that a mod can kick a player if the player is not able to control the trailer he is operating. Additionally, I’ve done the entire C-D with a 5 part trailer without any hiccups, and I am able to reverse the trailer into most of the wear houses. Of course this doesn’t apply to all the players. Finally, not everyone is going to use a 4 or 5 part trailer. I think that about 1/2 of all the people that use a triple will opt to use a quad or quintuple.
TLDR; not everyone will use them, and the mods reserve the right to kick people who can’t control their trailers.