[samus]

Sometimes, there is also functionality grafted to the wrong place in the system, or on to the wrong system. This can happen for a lot of reasons: expediency ("we have to foo the bar, why don't you implement it there as the release window is just right for our purposes"), bad design, or changing requirements.

If it stays there for too long, it will complicate the design of the underlying system because it has to be kept alive for daily business to go on. Such features are sometimes hiding in plain sight, and are actually causing a lot of pain or cause long-term risks, but we are too shy or spread too thin to address the issue. And why should we? After all, it works at the moment.