Hi @Crafter,
yes, you can update you shopware but you should know, that there is no pre check to all of your installed plugins.
As well - there is a problem with IonCube. All plugins, which are available in the shopware store have been encoded with IonCube 9 - which is NOT compatible with php 7 nativly. So there is a risk to update. The best way is to preprare all used plugins and check if there is an free version (not encoded) of the plugin. Next step is to check, that all plugins are officialy compatibel with php 7.1/.2/.3.
If it’s all done - enjoy the performance of Shopware on php 7.2 