What are the problems you actually have?

If you want to deploy and configure something, nix does that exceptionally well.

If you want to install up to date software on Debian, RHEL, or other distribution but not negatively impact the system, nix does that exceptionally well.

If you want to build containers, nix does that decently.

Nix solves a lot of problems beyond reproducible environments. And it solves them permanently for nearly all use cases.