For me the killer feature is Windows Support, Ericsson is doing a great job bringing nix into Windows, but the process it's understandably slow, If this project is similar enough to nix that I can kind-off translate easily the zb derivations to nix derivations, I'm willing to use it in windows (It's not like nix has windows programs in the nixpkgs either way I have to bring them in my own).

The problem for me is that I see no benefit on using this over nix language (which I kinda like a lot right now)