It's STILL not completed, over two and a half decades after the wall fell. The amount of money wasted is incredible (7.5M € in 2016 in direct costs, http://www.merkur.de/politik/hendricks-stellt-bericht-zum-bo...), not to mention wasted time and the loss of efficiency because teams and management are split across Germany.
Really! I had no idea. I barely ever see a reference to Bonn in anything I read about Germany these days; I'd formed the impression that everyone had moved in the 90s.