4K monitors, while still not a majority, are becoming more and more common. However, running BeamNG Drive at 4K is difficult for most machines. Resolution scaling for the actual 3D graphics independent from the UI would be greatly appreciated, and would make it possible for players to run the game in borderless window mode even when they cannot run the game at the monitors' native resolution. Currently, the experience of running the game at a sub-native resolution is not so good. If you tab out of the full-screened game, it'll automatically go into windowed mode in your chosen resolution. If you then hit ALT+ENTER to enter full-screen again, the game will enter full-screen mode in your monitors' native resolution (in my case 4K), meaning that I have to manually lower the resolution again every single time I re-enter the game. Two examples of games that do this well (from the top of my head) are Tekken 7 and Microsoft Flight Simulator 2020.
