Hello Erwnxotr,
Among the reasons why players do not play in Simulation 2 are items such as the speed being 150 km/h. These speeds are a bit high for TruckersMP, a truck game. Performing such speeds in the game may increase traffic accident rates. For this reason, the majority of players log in to the game by choosing the Simulation 1 server. Another factor is the number of players on the server, Simulation 1 is able to attract members by setting a speed limit closer to realism, and in this way, Simulation 1 has a larger player base than Simulation 2 and is better able to attract the attention of players.
Regards,