I think the Conda ecosystem is the closest and has even better ergonomics than Nix. Especially with Pixi, it is a joy to use.
If one is using Python.
All these s suggestions always fall off, because they are special cases for given programming languages, or operating systems.
Conda does not solve the problems of deployment and they don't have any reproducibility guarantees. That's not surprising considering how Conda binaries are built.