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With regard to this comment: "deprecated the old feature-complete product (ACS 3.4) before finishing the new product (ACS 4.x); note that this is a well-known way to kill a company among people with software products experience; Informix self-destructed because people couldn't figure out whether to run the old proven version 7 or the new fancy version 9 so they converted to Oracle instead)" Philip is absolutely correct as my experience with aD confirms. I went to the website recently trying to decide between various systems including ACS and Enhydra. When I saw the rather uninformed choice between the 3.x and 4.x products on the aD site that I was going to have to make, I went with Enhydra. Having worked for 3 sizable software companies previously and grappled with this issue, the point is particularly poignant and should not fall on deaf ears. Also, having participated in the (startup) development of similar software products in the past and then having to watch some gigantic ...