This thread and the other "3D software for mechanical drawings" were past over by a friend of mine and here again are a few cents worth of opinion in term of CAD trend for the last 14 years.
I have used 2D AutoCAD back in 1987. Then MicroCADAM in 1991. I remmember back on those years...
I have used 2D AutoCAD back in 1987. Then MicroCADAM in 1991. I remmember back on those years I was just refering to a simple documentation to learn AutoCAD all by myself. And it take few days training for MicroCADAM.
Then come Pro/E ever since 1994 (Pro/E R14) where I struggle to learn 3D...