I have been learning and using Nix and NixOS for the last few months. Learning how to use it has been a tremendous effort. Often, I wonder if I'm actually at the butt-end of some sick and depraved joke by a disgruntled sysadmin (they are all disgruntled always, no?). Nonetheless, the reproducability keeps me coming back. I enjoyed reading about how a big player like Shopify is using it. It makes me feel like I haven't wasted so many late nights.