I recently changed my nixos configs to this approach. Takes a bit to remember where I put everything and what modules things are in but in the long term it makes things easier to manage. Also makes things easier if I need to turn modules on or off for whatever reason.
That being said does take a bit of work to get everything set up but in the long run it's worth it.
What do you mean? Dendritic approach or having modules in a separate flake? Or both?
going the Dendtritic Approach.
It's certainly very helpful with that, I can say I learned quite a bit about nix, but also about flake-parts during the migration and I'd say the latter is criminally underrated in the community.
the thing with NixOS is there's really no right or wrong way to configure your system. I know a guy that just straight up has a single configuration file and then just uses comma for everything. like practically nothing is installed. when he uses firefox its ", firefox" in a terminal. he likes it.