You've got the second-system problem where people who've had some success are given a blank slate and allowed to do whatever they want. Generally, they will fail because they'll be too ambitious, they won't understand the limits. And you get nothing out of that. You have to have extreme discipline to say, “It's not a blank slate; it's reimplementing what we had here; it's doing what we knew.”
Crackford on big rewrites
