This thread is very timely, as I'm looking to switch from macOS to Linux, and I tried years ago, but was turned off by difficulties getting the keyboard setup the way I wanted it.
One of my favorite macOS applications is "ShortCat", which allows you to chord a shortcut (cmd-shift-space) and gives you a "GUI search" wherein any text that is on the screen (on any monitor) becomes selectable by typing it and choosing a selection...kind of like the way Vimium works in the browser, but for your multi-application context. I am comfortable with vim bindings generally but don't really care as long as there is consistency (pre-baked preferable, but configurable works). I've tried Linux years and years ago and my biggest gripe was that there was no unified "system" for handling setup of keyboard shortcuts / macros. "One system to rule them all" would be ideal, or at least "one system for each context layer, consistent between applications."
I am getting option paralysis since I know there will be a learning curve, and I don't want to spend a lot of time customizing just to find that the distro I picked is not going to meet my needs without a ton of deep customization. What Linux distro and/or window manager is going to get me multi-monitor HiDPI support with good keyboard-only navigation? From lurking HN i3 looks like it might be favored in my situation?
I want a workflow that allows me to easily jump from window-context to window-context, tab-to-tab, sub-window to sub-window, independent of monitor or applications.
I would consider something minimal like NixOS or Arch if someone could recommend a good playbook/setup for someone like me, and Manjaro and Pop_OS both look cool, but otherwise will probably default to Ubuntu for beginner google-fu.