I agree that cost is a consideration of doing the port. From my experience what renderering API is used at the bottom is a very small factor in that cost calculation.
I think where we disagree is that I don't think of the lower level API as being much of a lock in. The better graphic programmers I know have pretty extensive experience of the various flavors of DirectX and OpenGL. The general principles are the same and good programmers move between them easily.
I think where we disagree is that I don't think of the lower level API as being much of a lock in. The better graphic programmers I know have pretty extensive experience of the various flavors of DirectX and OpenGL. The general principles are the same and good programmers move between them easily.