I came across this article by Mike Hadlow via Twitter. I found that I could relate some of what was described in the article to my own company. It is well worth a read
“Once the software gets part a certain size and age, it becomes almost un-movable and a real hindrance to the business. Often the response is to start from scratch, but this just makes things worse as the new system gradually goes the same way as the old, and in many cases never fully replaces it. Then there is the additional task of integrating the old and new systems, usually as a ‘temporary measure’”
Daily Scrum 