At JAE and dcarr, I think you are both talking about RAM Structural System, not RAM Elements (formerly RAM Advanse).
When it comes to the black box reputation RAM SS has, that probably comes from the amount of things that are automated, but there is an abundance of output to clarify the calculations that have taken place. You do need to be careful using software, any software, because it has to make assumption that might not be consistent with your own.
Regarding the continuous foundations supporting walls, the program assumption is that the foundation is like a beam on closely spaced compression only springs, and the stiffness of the wall above can be accounted for by multiplying the inertia of the foundation under the walls by 10. Then the forces from the wall above can be applied to the as a point load resultant at the wall centroid. That’s probably a fine assumption for a short shear wall on a thick footing, but not so good for a long footing supporting a CMU wall or tilt-up walls with small control joints.