How many FreeBSD's jail escapes did we have in the last 20 years? Same question about VMs there.

> but I would argue that it's very inefficient to boot up a VM for each application instance

https://doc.qubes-os.org/en/latest/introduction/faq.html#doe...

> A container/jail is virtually the same as a VM

No, it's not, https://hn.algolia.com/?q=container+escape

Also Qubes doesn't just use VMs but enforces virtualization with hardware (VT-d).