Felix, I was wondering about that statement about not being able to "click compile" in GMax...
...until you mentioned all the
other stuff that FSDS creates automagically during the "compile," none of which is an inherent part of the actual
model being compiled.

Setting up a "template" for FS9 or FSX models is a one-time process, even for Max or GMax users. Do it once, then copy/paste/rename as needed for each project one decides to work on.
As for .air files, ACES were nice enough to provide base .air files for nearly every kind of model that one can use as a starting point.
OTOH, I believe the strongest feature of FSDS
is it's facility for setting up the basic structure and auto-configuring contact points, et cetera, as it frees the newbie modeler from having to do so manually.
The weakest feature of FSDS is its lack of advanced mesh modeling tools, which are a basic part of even GMax.
However, like you point out, what Bobby has accomplished with the Citation X, especially the forthcoming new FSX model is nothing short of amazing!
What this
proves is simply this: the
skills and
artistry of the modeler are responsible for the end results, not the tools used! The secret ingredient is "craftsmanship..." 8-)