macOS is my favourite operating system. Finder in column view with arrow keys to navigate, combined with space for file preview, is incredibly fast and intuitive. Trackpad integration also results in less hand movement. I'm building a Linux (Bazzite) desktop, though, and I've set my sights on the stars.
nnn looks to be an incredible file manager, and was a great recommendation. It looks even more capable than Finder, albeit without scrolling/zooming previews, thanks to macOS having unmatched trackpad functionality. Not to mention Spotlight, which makes opening apps trivial--especially with Alfred available as well. I want to go beyond mere file management, though.
File managenent, browsing, gaming, everything. Just how much can you configure a Linux system to eliminate mouse usage? Shortcut guides welcome (I already know the major ones). I also have a keen interest in tiling window managers, but I've not delved that deep yet. I don't know how to set one up.
Guess I'm forced to learn Emacs/Vim/similar.
I spent about a year in NixOS, and my main desktop still has it, though mostly out of laziness. I did end up switching back to Arch, mostly because if there's anything you need that isn't in the Nix repos it's a pain to install. The other big issue I had was the lack of documentation, so you'll be figuring a lot of stuff out completely on your own, because Nix works differently enough to everything else that a lot of general Linux resources just don't apply.
If I had a recommendation for switching to nixos, I'd probably say use the Nix package manager on Arch for a while first, and just slowly switch everything to Arch. It'll get you more familiar with everything, and then you can make the switch more easily.