Yep, indeed I did. And this argument I could maybe follow from a user point of view.
To answer the question from the last screenshot:
From technical point of view there is nothing to turn off on a polygon mesh (as Cerbera already said). The checkmark/enable should be called correctly "Generate Polygon Cache", because that's what it is doing internally. A polygon mesh is the cache itself, so it does not have this option. This should also explain it for Back-/Foreground and Floor (neither needs a cache). Figure, Lathe, Rectangle are all parametric objects with a poly cache which needs generating. The only one I would need to think about is the Stage object. Technically I think it needs one, because you can parametrically select background and foreground objects, which then get cached in the Stage object.