Rigs of Rods, to me, like what @Tom P. said 7 months ago (Sorry for bumping his post), is what Sim-Monsters needs. With the way the forums, downloads, leagues, etc. have been structured, BeamNG just can't handle it as it stands. BeamNG doesn't even have a multiplayer, and from what I've read there won't be for quite some time. RoR has a while yet to be the standard for SM, unless BeamNG develops multiplayer or another game similar to RoR or Beam comes along and is better out of the gate.