I know you can basically turn arch into catchy, but I see no reason to when there is a pre made distro.
As for Nix, I think it looks very interesting but I very much love arch for my desktop and am not really looking for a replacement at the moment, but it is number one on my list for the future if things change
You can put Cachyos tweaks kernels and repos on top of arch or nixos if you like.
I know you can basically turn arch into catchy, but I see no reason to when there is a pre made distro.
As for Nix, I think it looks very interesting but I very much love arch for my desktop and am not really looking for a replacement at the moment, but it is number one on my list for the future if things change