Comment by Asdrubalini

My router (a VM with passed through network card) is currently running on NixOS, I’m really happy so far, it makes kernel patching (which in my case is required for the nic to work properly at 2500BASE-T) much easier than manually patching and building the kernel every time. It also gives me the guarantee that I will be able to rebuild the exact same host almost bit by bit in the future, in case of necessity, which is important for something like a router (I also take vm snapshots but upgrades are crucial for something potentially facing the internet and handling firewall). Looking forward to move away from proxmox to a fully NixOS virtualisation host too.