Is it possible to create a program that imports a 3d model, and then you clarify in the program what each part is named (EX: left front door), and it poops out a working mod? I feel like vehicle mods are painstaking to make, and that's why most people don't make them. Maybe this could be something Official BeamNG makes. I mean, they practically do it for automation users.
Blender does close to that with addon, but still you need to build skeleton in Blender manually in addition to 3d model. https://www.beamng.com/threads/blender-addon.56981/ It does still take quite bit of manual work, practice, learning and experimenting, but a ton easier than doing everything in Notepad++ or with NBEditor.
There are thousands of variables to get a vehicle working right (powertrain configuration alone takes hours if not days to get right), and that's after the vehicle has a working and stable jBeam structure. The jBeam structure alone can take days if not weeks to get just right, and it's not a process that could be automated. It'd be different for each and every vehicle on the road.
The Automation Exporter does that. Although an automated script cannot fully replace an actual person, so it comes with trades-off, like the overall Jbeam complexity and so on.
I would personally like a feature that atleast helps with creating vehicles in some way. The insane amount of work and bugfixing has always been maybe the only thing that put me off from making mods, and than the possibility of the mod breaking the next update and it just not working in general is fun. Making maps are hard enough for someone like me, so that's what I'm gonna stick to. Maybe someone with more confidence or whatever is much more fit for making mods. Yet, like Arcanox said, there are so many variables in making the vehicle, it'd most likely be impossible, even with help from others....which is kind of another reason I've been putting it off, I'm a weird and anxious blob.