Qubes has recently published a release canditate for version 4.0. I’m upgrading my system, and taking some notes as I go… Users of Qubes know that template VMs tend to lag behind the latest release of an OS. As I write, for example, a Qubes template is based on Fedora 26, while Fedora 27 was released almost 3 months ago. I mention this not to fault the Qubes team, who do great work.