I don't think so. I do a bit of AutoCAD at work, mainly for pressurized vessels (i.e. pretty simple stuff, just has to follow the regulations). 95% of the time, you're working with a 2D sketch in either the x, y or z plane and extruding from that. The other 4.9% of the time, you make some other plane based on those extrusions and do 2D sketches in that plane. 0.1% is reserved for 3D splines.