law 45

Tell about the need of changing, but don’t change a lot at same time

This law could be a lesson of software engineering.
You must think in few releases of code for the client each time. Small changes have small risk.
One thing very important for interfaces: change a little bit version after version.
It can help the price of the app, because of investment and return of investment. This law cannot come alone. The price of the app is important for accessibility.