Possibly it's because it's hard to get things right the first time, but sometimes it's better than the old way so there's a big shift to it, and once we know a

Possibly it's because it's hard to get things right the first time, but sometimes it's better than the old way so there's a big shift to it, and once we know a better way it's hard to shift people to the better thing because the old thing was just good enough. Come to think of it, this probably applies to any product.