Whitey - 4:27 am on May 24, 2013 (gmt 0)
It simply outlived its usefulness
Sure ... but why? e.g. Was the platform subsequently found out to be unable to scale, was it intended as a stage 1 project/algo, did it hit major "unforseen's" , etc etc
It's a tough question, but some perceptions and perspective of thought about what Google faced in it's task might lever open some answers. [I'm not expecting much, but some folks might have some ideas to go deeper].