SysML is a language devoted to system modelling, suitable for tackling the challenges of modern industrial systems development. Currently, a new version is about to be standardized, SysML v2. This new version contains a lot of relevant features, but required a complete redesign with respect to previous versions. In this presentation we introduce some key novelties of SysML v2 and then discuss what users can expect as side effects due to migration from older versions to the new one.