I have to agree with sterileopinions here. The fact that it's been done multiple times before means you know a lot about how hard it will be, the necessary resources, and can learn from past mistakes.
That doesn't make it easy. But it definitely makes it easier. To say otherwise is to argue that experience isn't useful.
That doesn't make it easy. But it definitely makes it easier. To say otherwise is to argue that experience isn't useful.