What about a more casual qubes?

[scales]

Your question is like my comments.

Porting Qubes to hypervisors other than Xen (abstracting the functionality) - early stage

Qubes os vs KVM on Linux(This is not war!) Cons of Qubes os Security by separation vms, Qubes os is most secure os. Unless bug is exist on Xen, threats can not attack to dom0. If user must copy data to dom0 from vm, this process is made very complexly, fail of user is been suppressed default. Multi templates can use at the same time without dual boot(But Qubes os supports to Linux and Windrows only). User can use disp-vm, all data on disp-vm are delete with shutdown, SSD usage suppresses. …

Very cumbersome of Qubes os is passwordless-root.
This is not able to KVM, if user uses lightweight Qubes os by KVM, user must enter password all VMs.
So usability of Qubes os is very good, but user can not choice any init system and distributions on Qubes os, user have not freedom of init system choice.