>Hooking up to and generating calls across filesystem APIs cost multiple orders of magnitude more than calling `ls`. These tooling ideas are interesting, though. Maybe Kenneth_E._Iverson was right all along?

I don't think you understood what the idea was. Its not about calling `ls` vs not. I don't think UNIX commands are going away (or at least deterministic calls).

Its the interface itself that would go away. We won't work on terminals but some other interface which would use commands internally.