Using nixos is a chore like brushing your teeth. Oh... I mean "teeth being brushed" (declarative).
It takes work. A big investment up front in configuring it and tiny investments for as long as you use it to maintain the configuration. Sounds like a scam but I thank myself for this investment every time there is a bad update or running a project with a flake and having it work fine after many years of sitting idle (which is suprising in the modern norm of having a web of dependencies). This brings an insane amount of confidence in any change I make to my system which lets me explore more things without being afraid touching the wrong thing on MY computer.
I've had it running as a daily driver for about 6 years and on my home server (just an old laptop) for more than a year. My review: 10/10, do it.