MD11's story is a long sad one, posted several times before. In a nutshell it amounted to struggling MD issuing a derivative design quickly in order to snare orders from its loyal customer base (who had bought DC10s before) in anticipation of the A340 and of a Boeing competitor, which became the 777. Alas, the initial disappointments of AA proved a major blow and, even though MD improved the design and offered upgraded versions, the all new A340 and 777 quickly captured the market and killed the MD11. The final rites were performed by Boeing when initial optimism of freighter sales faded, largely because new freighter sales are generally small and, in any case, MD11s were being rapidly sold off for freighter use, especially to FedEx.
Hop to it, fly for life!