My experience has been similar in the past. In more recent times I've seen numerous products rewritten from scratch by completely new teams on different continents - the mindset being that they would do things "properly" - only to encounter all the problems that the original teams had to deal with, and re-implement the same mistakes, but in a different language. In one case, the new team quit to a man ( and obviously, the old team were nolonger around either ), resulting in the loss of two complete product implementations, and all the domain and implementation knowledge.