No experience with NASty, but: Had a server die on me about a year ago and wanted more Infra as Code. Tried Fedora CoreOS first, but the cycle was constantly creating a new USB bootable, it was just a bad fit for me. Switched to NixOS and definitely still not an expert, but it’s simple enough that 4 machines are running it. I really enjoy it. Already migrated a critical machine, where I basically used a second machine for A/B testing, to ensure minimal downtime and rollback possibility. My deploy story is still kinda jank. I just looked at what worked and didn’t read too much about the internals. Using deploy-rs and falling back to nixos-anywhere when necessary. Some new services were really basically as easy as adding services.example.enabled = true; and deploying. Hope it helps an good luck!