Compared to X-Plane, FSX and P3D, at least FG has had a first class script language built in for 16 years; Nasal isn't that hard to learn or understand to do the basics; and you can get a flying model with no Nasal code at all as most of the model is in declarative XML.
If we rebuilt FG then LUA is maybe a better choice; but remember that every cycle spent processing a scripting language is going to impact the frame rate, even if you had full multi-threading.
Thanx for the info. Yes, i can see that there are many things to consider. Will check out the links. But im just not gonna learn NASAL for single application use, or try any more blender exports.
For any projects i will work on, i want open source all the way.