PC-BSD[0] (the desktop-focused fork of FreeBSD) does look like quite a promising systemd-free alternative to Debian. One potential problem is, as always, that the graphics drivers[1] lag behind Linux, so the latest stuff might not be supported.

And until bhyve[2] adds support for Windows guests (which they plan to do) I still need Linux's KVM.

[0] http://www.pcbsd.org/

[1] https://wiki.freebsd.org/Graphics

[2] https://wiki.freebsd.org/bhyve