It’s not all too realistic to drive many “4WD” trucks and vehicles in game in 4WD full time. Some trucks have 4 High and 4 Low along with 2 Hi and it’d be nice to be able to adjust these for more vehicles during gameplay and not by adding a diff upgrade and manually tuning to put power 100% to the rear.
The GR Yaris has its “Sport” and “Track” modes that changes its power distribution like the real car does, but it’d make several 4WD vehicles more dynamic in their gameplay