That's good to know that for the vast majority of cases 2D is sufficient.
I do have Blender installed, but I never had the time to learn it. I assume Substance 3D Painter is not free, because it's an Adobe product, right?
The thing I find most difficult to paint on the 2D livery are the nose cone and tail sections, and the inside of the rudder. By using the UV map it helps somehow, but it's still fiddly and really time consuming, especially because you have to wait for X-Plane to reload the aircraft... Unless of course there's a better ways of doing all this that I don't know of! 🤣