The only reason I ever developed my own CAD software was because there was nothing else available, or it cost too much for my project to pay for by saving me the time of doing the work manually and mentally. Same today. If something out there does what I want, I buy it. If one CAD program does this and another does that, and I can write an interface, import, bridge or collaboration application, I will do that. My billing rate is enough to buy a full copy of AutoCAD or Solidworks every day, but they don't do what I need.
