The Official BeamNG Changelog details several massive leaps in simulation and gameplay:
The venerable D-Series received a "flex-frame" update. Before 0.8, the truck felt like a single rigid block. After 0.8, driving the long-bed version over a speed bump caused visible chassis twist. This "flex" meant that rock crawling became a legitimate challenge—if your chassis twisted, you might pop a door open spontaneously. beamng drive 0.8