In every way that can possibly be interpreted, yes.

Yes; the difference with NixOS is that you can go way longer than you ever should without updating it, and then do a full system upgrade, and then turn around and walk away without ever having to worry about anything breaking.

My dad uses NixOS. My dad knows precisely nothing about computers; just ask him, he’ll tell you. I figure, since he’s gonna call me for free tech support no matter what operating system he has, anyway, I might as well make everything as reproducible as possible for my own sake. I tried putting Debian testing on his computer, and honestly, that was actually pretty good except that I had to update it for him at least once a week in order to keep everything running smoothly, lol.