The speed of panning and zooming in AutoCAD and Solibri never seems to be limited by my computer. Revit on the other hand, viewing the exact same DWG-link (and nothing else) as AutoCAD, is dragging its feet and visibly lagging. Because of how much time Revit spends on handling DWGs in relation to renovation projects(linking, import,export), I am seriously considering spending the time to learn AutoCAD. Not for new buildings of course, but the office I'm working in is handling a lot of small renovation contracts, and allthough Revit does many things better, the enormous difference in processing/rendering speed of dwg's (viewport rendering, not artistic rendering) might actually make it worth it. Compared to Solibri, the speed in 3D-rendering is also very slow, so the room for improvement is clearly there, it's not just hardware that's causing this.