I tried it a while back, thought it would be good for my servers, but at the end of the day I found that it was a lot of learning for a very small benefit that could be achieved differently. Instead I focused on learning Ansible which also allowed me to write configs to deploy lots of services to my servers. I still want to learn Nix at some point, but I feel it’s a lot less important if you have an Ansible playbook that does the same thing and even more for any distro you might care to install.