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.
Very, I only really use my mouse for playing video games at this point. You don't really NEED to use Emacs/Vim/etc, but they do help a lot. Ranger (file manager), cmus (music player), qutebrowser (web browser, full featured unlike Lynx, which I do still like, but I use eww in place of it most of the time), etc, etc. Tons of stuff that can make your setup far, far less mouse dependent. Starting with learning the terminal, then using a twm is how I got to the point where I am now where all non-necessary mouse functions are replaced by keyboard keys. Just note that it did take about ten years to get here, though that wasn't me actively searching for ways to do it, more just naturally making my computer work how I wanted it to without the specific end-goal of zero mouse usage.
Edit: Forgot to include that I did most of this before learning Emacs at all. I've used nano for most of my time on Linux, only switching to Emacs last August. Only thing I didn't have before that was cmus. It also works as an email client, but ehh... I don't feel a strong need to switch away from Thunderbird at this point in time.