The other thing is to judge your customer base properly. Once customer satisfaction is positive, it is a big hurdle to overcome. To supplant "Good enough", it a

The other thing is to judge your customer base properly. Once customer satisfaction is positive, it is a big hurdle to overcome. To supplant "Good enough", it appears that the new product has to be the 100-200% you stated. Microsoft has had the same issue with its own upgrade (Windows XP), although that's a bit more debatable. I think it's a similar lesson though.