codesearch.debian.net says remove(Update|Event|Cull)Callback (the affected methods) are only called from simgear (done), osgearth, and one of the OSG examples (not anywhere in the OSG library itself, so indirect use doesn't appear to be an issue).I haven't looked in enough detail [yet] to see if those rdepends need binNMUing, and I don't know if there's a clear-cut way to determine
Hence, it would appear that if anything else needs binNMUing it's osgearth, and I have already informed its maintainer (https://lists.debian.org/debian-gis/2014/11/msg00006.html)
As stated in #765855, this isn't a transition: the issue is that the thing we want changed (i.e. the previously-buggy inline method) doesn't change without a rebuild, not that anything else does. Installing the rebuilt simgear fixes the bug even without upgrading openscenegraph itself (though as 3.2.1-5 also fixes #763821, I do suggest requesting an openscenegraph unblock).especially if the issue is because of subtle changes of code