The software gained popularity among mid-sized engineering firms and independent detailers because it did not require the full investment of Revit or Tekla while offering powerful automation for reinforcement design.
If you maintain a legacy workstation, ensure SP2 is installed. It is the difference between crashing at 3 PM and finishing your bar schedule before lunch.
Today, ASD 2015 SP2 is considered a piece of "classic" engineering software. Most firms have migrated to Advance Steel for its automated detailing and Dynamo integration, leaving ASD as a memory of the era when 2D drafting first truly met 3D modeling.