This is known as the "lava flow" anti-pattern. I kind of like the visual imagery of the two. With the strangler pattern, you have new living pathways to deliv

This is known as the "lava flow" anti-pattern. I kind of like the visual imagery of the two. With the strangler pattern, you have new living pathways to deliver functionality. With the lava flow anti-pattern you have petrified remnants that lead different places, but which have died. From my own experience, when you take over a project that has attempted the strangler pattern, but got cancelled the key is either to continue it (holding your nose if you don't like it), or remove it and go back to the old infrastructure. If the new pathway is better than the old, go with it until you can remove the old one. Even if you have a new super zappy way to do it, resist introducing it without "finishing" what what started earlier (one way or another).