Allow me to jump in here.
It’s true, AutoCAD is faster with 2D linework. Much faster, highly optimized. That’s among the very few things where it’s better than Rhino (second thing would be dynamic blocks, and that’s about it).
Yet the moment you go 3D (by orbiting the scene), it ‘thinks’ a while, and then the viewport performance advantage is pretty much gone.
You must have experienced this yourself. Take any really big 2D plan an give it a try.
Could we please have a ‘live’ Make2D mechanism? Maybe even with layout space as target? Including DWG export from there?
(The VisualArq guys are after that, as you know. However. it is debatable if this kind of feature should be charged an extra €800 for.)