Hilariously, because Ozone7 can host VST plugins in the chain, I *can* use ARC in Izotope's standalone mastering product, but not in IK's own (yes, I checked).
That seems... ironic, at the very least.
(edit: and, for that matter, Ozone can host all my other T-Racks modules! And any others I want to use in a chain!)
I still might go for this but it sure does make the standalone environment less attractive, and it sure doesn't make a whole lot of sense.