Nix is not place that you want to go just for the hell of it.

If you want to be able to store your entire operating system config in a repo, and spread it to a bunch of other boxes, and have the ability to rollback to any point in your install history, it's the bee's knees.

But to do that, you need to rely on there massive community repository of apps understand their language, and be ready to fight with most uncommon packages that you might want. You can't just install or upgrade apps anymore. Upgrading channels to get app updates as much less likely to go smoothly.

Overall for me, NixOS is a net positive but it's not by that much. If I were going to go from scratch again I'd probably just go back to Debian. But, sunk cost fallacy I'm in it now and I need a good reason to get out of it.