There is no other stack in the last 15 years or so that I look back with the same fond affection as building business applications in Clipper. One important aspect was that software was delivered physically, and I could watch my users using them. If I made a report that helped the operator, or made a workflow easier, their happiness was immediate and nurturing. And there was an immediacy to programming in xBase - if we're building a database backed business application, which was their strong suit, there was very little standing in between us and the problem space.