I worked in software development for many years, and I can say that even in a well-managed system, guzbucking happens all the times. There are always gremlins hiding in the system. No matter how much you plan, those little suckers find a way of creating havoc. If you have a strong foundation, you can isolate the problem and minimize the damage. In something decentralized and still new like the blockchain, the best you can hope for is great people so passionate about the project that they are willing to stay up day and night to fix it.