I have been an AutoCAD user for "Years" but struggled with ADT. Found very unfriendly and went down paths I didn't want to go.
Revit's simplicity v's ADT complexity.
Have been a Revit user for only five weeks , no training and feel my Revit productivity has already passed my ADT productivity.
Still going back to AutoCAD for detailing , site plans etc.
Time I'm sure will see me use Revit for this as well soon Have not thrown away ACAD skills. Exporting & linking each way adequate.
There are bound to be better informed users than me ,my Revit knowledge still very limited . Find Autodesk pushing Revit more than ADT, look forward to reading further comments. - Jim W