I don't know, dank-material-shell fills the same niche, and works better on NixOS out of the box, making it easier to setup while highly configurable. It seems broader than Noctalia in scope as well, so there are more components and they play nicer with each other.

Noctalia seems like it would fit more slimmer builds that want to move away from waybar.

Noctia* Gnome's Nautilus stuck in my mind gahh