The fact that IT is such an exciting topic has a lot to do with the constant changes. In hardly any other industry do new technical developments follow each other so closely. Ground-breaking new products are launched on the market in rapid succession and often become widespread very quickly. However, it often happens that after a few years, competing products emerge that replace their predecessors thanks to having a better concept, a modern interface, greater functionality adapted to current requirements, or simply lower costs. In this article, we present a series of examples in which programs…