"Easier to use" comes at a cost. I have to wonder whether there's a lower limit to how "easy" reproducibility can be. It is a matter of physics at some level, and the ease of reproducing software can often depend upon what its dependencies are and how easy *they* are to reproduce.

I think that using less software, and better software is part of the solution to making reproducibility easy. But FWIW, I do think that Nix lowers the barrier to making reproducible software.