imho, that notion is afflicted with the Aristotilian/Paltonic solid stuff which presumes there’s a perfect chair somewhere and all other chairs are perversions of that one.
Maybe God has lots of different perfect chairs.
Maybe He loves watching His kids create ever new versions.
I think in a certain way this goes back to A-G's reference to permanence and flux. For Plato, the "perfect chair" is the [permanent] model on which any chair at all is built; it is the very idea of "chairness." The "perfect chair" resides only in the mind of God: There is no "perfect chair" in physical reality, just every type of chair constructed according to the paradigm of "chairness" that resides in the mind of God, which is the permament standard of chairness that does not change. Nothing can be said to be a "chair" that does not accord with this "perfect chair" -- it would have to be something else. All physical chairs are just various executions of that one chairness paradigm. Thus the "perfect chair" paradigm is also an instance of "non-existent reality"....
But then, the great Greeks may be an acquired taste, and not of general interest nowadays.... more's the pity!
Maybe there are many "perfect" Gods?