Yeah, IFC is the format I had experience with trying to coordinate between ArchiCAD and Revit. There's probably a better way to do it than the way we did it at least at first, because initially Revit imports the IFC with everything as a generic "object" family instead of windows, doors, ceilings, etc. which make it impossible to configure views to show the correct things. There are probably settings in ArchiCAD that fix this when exporting, but it takes experienced people on both sides.

In the context of design projects that don't always have the most realistic schedule, it's just one additional hurdle to deal with that isn't there if everyone is using Revit.