Qubes' design means hardware and software are all separated so a vulnerability in one doesn't mean exposing another.
I like that in their docs they mention an approach they take and when it isn't secure[0]
That being said the main point of security contention is the admin (dom0).
Between the twilight of Moore's law, and the success of open-source software, I just don't see that much long-term value left in x86+PC.
https://blog.invisiblethings.org/papers/2015/state_harmful.p...