I've never used FreeBSD and I appreciate the appeal, but to me the most exciting ideas in OS space are being developed within Nix/Guix projects. I am putting up a NixOS-based homelab server right now. Does FreeBSD have anything remotely similar?
No. FreeBSD enthusiast will tell you there's no need for something even remotely similar. I love the OS but some of the zealots are the reason for the miniscule size of the community.