So what happens when the Structural consultant uses Revit Structures 2(name not official). And the Architectural consultant uses Revit Building 8. The Struct. consultant can't downgrade all his families. The Arch. consultant can use the Struct. file. Ouch!!!!

To make it more interesting....
Both are not on a subscription and each has a (4) man project team. Oh and....there is a lone individual (per the clients request) who will model the a few furniture items.

Does a scenario like this throw a red flag? Could it happen?

Was this a major problem with AutoCAD?