Kernel type Microkernel (Xen Hypervisor running minimal Linux-based OSes and others)
Userland Fedora, Debian, Whonix, Microsoft Windows

There's nothing minimal about KDE...or Fedora.

Worth checking out for ideas, but don't do anything that would get you killed or imprisoned on it. Systemd on Fedora, with MS windows...Debian on Systemd on a virtual machine on a Hypervisor....on x86-64 with Intel AMT and ME....think deeper about this problem...

I don't care if Edward Snowden or Edward Norton uses this and swears by it. There are deeper more serious problems going on at a more fundamental level (hardware, bios, kernel, user land, package repository) , that this product isn't going to help you to avoid.

Isolation and compartmentalization are good ideas, but just use 4 different machines instead, rather than relying on one computer, some virtual machines and a hypervisor to do the isolation for you...

For browsing onions for porn or for cyber-stalking your ex.... go ahead. But for serious shit that could land you in jail or get you killed, using this system and expecting immunity from surveillance is unwise.