Under that line of reasoning, any D:Sun spell should only be able to affect an immobile target, from Panic of the Trembling Heart to The Captive Voice, from Edge of the Razor to Shape of the Woodland Prowler. Not just those with T:Boundary. It's a cool idea conceptually, but it requires reworking pretty much all the body of existing spells.
Or you could just consider it an interaction between Boundary and celestial duration spells (as part of the definition of what a Boundary is).
This seems to imply that since wards on a container target, rather than merely acting on the border, or on the warded substance, affect "the interior of the container", and so should Warp that container's interior as a constant mystical effect. If true, "we'd like some examples of warping on objects" goes from "this would be nice to have" to "this is critical to determining whether wards are usable in-setting for routine purposes by non-imbeciles".
This isn't new. See ArM5 (2004) p.114 Magical Wards:
the target is the thing protected, rather than the things warded against
This isn't new either. See ArM5 (2004) p.168 Constant Mystical Warping:
Wards are active mystical effects as long as they are protecting someone. Two notable exceptions are Parma Magica and the Aegis of the Hearth, which are based on the same breakthrough by Bonisagus.
Okay, apparently I'm just a dumbass. I mean, I always knew (for example) a maga's Personal/Individual wards against, idk, fire and metal weapons would warp her if she kept them up constantly, but I also knew that Circle or Room warding the pantry against rats was a non-issue, and apparently I made that second bit up out of whole cloth ten years ago and it never occurred to me to think otherwise.
Sorry.
Edit: My own idiocy aside, this confirms that we do desperately need some sense of "is warding the pantry against rats going to cause more problems than it solves" with regards to object warping, a question which remains entirely unanswered in canon as far as I'm aware.
The pantry is not a serious issue. Things in the pantry are not, for the most part, there for years and years and years except the shelves and people don’t spend a ton of time in there.
The pantry might not be an issue, but you also have wards against things like vermin and rot used for things like warehouses and ships holds at several points in the books. Those will have people spending a large amount of time working in them.
So the question is do the wards cause all of your warehouse workers to warp.
This is a good question but ... shouldn't it deserve its own thread?
Because I think that ultimately it's about deciding whether a) we want long term wards on areas to warp the stuff in those areas and b) depending on whether the answer is yes or no, how do we phrase how wards operate. I think regardless of the answer to a), this can be addressed fairly independently once the issue of how Containers operate is settled.