Upgrading openSUSE with zypper

With no doubt, an installation from scratch allows to get rid of all misconfigurations, packages installed once and never used, and broken or unneeded dependencies that most of the times we accumulate from time to time while playing new applications or system settings, upgrading openSUSE Leap through zypper instead, might perform enough well and, at the same time, avoiding to repeat the standard, several, boring configuration steps, to save time.