In the early days of Delphi I considered it to be a huge competitive advantage in terms of productivity and speed against everything out there. As time went on, though, it slowly died, and it became increasingly difficult to find and integrate 3rd party libraries, or find developers to work in the system. The user interface aspects of it also became dated and difficult to make modern.
Too bad, as I really liked it, especially the language. I liked the AMIGA as well, which also was ahead of its time and seemed to suffer a similar fate.