The software always was fairly horrible behind the scenes, albeit with a nice user interface. However I've spent years and years dealing with the sheer awfulne

The software always was fairly horrible behind the scenes, albeit with a nice user interface. However I've spent years and years dealing with the sheer awfulness which is VDDK (https://libguestfs.org/nbdkit-vddk-plugin.1.html https://libguestfs.org/nbdkit-vddk-plugin.1.html) which leaves a bitter taste.