The last btrfs machine: migrating my PC to ZFS

My GPU machine was the last machine in my fleet still running btrfs. I bought it for gaming (which never happened), and these days its dual RTX 3090s almost exclusively run local AI models . btrfs itself never failed me. When I set up NixOS on this machine for the first time, I had read enough forum threads to become convinced that ZFS and NixOS were a troublesome combination, so I picked btrfs to…