Zellij instead of tmux (not necessarily better, but it's easier to use)

Xonsh instead of bash (because you already know Python, why learn a new horrible language?)

bat instead of cat (syntax highlights and other nice things)

exa instead of ls (just nicer)

neovim instead of vim (just better)

helix instead of neovim (just tested it, seems promising though)

nix instead of your normal package manager (it works on Mac, and essentially every Linux dist. And it's got superpowers with devshells and home-manager to bring your configuration with you everywhere)

rmtrash instead of rm (because you haven't configured btrfs snapshots yet)

starship instead of your current prompt (is fast and displays a lot of useful information in a compact way, very customizable)

mcfly instead of your current ctrl+r (search history in a nice ncurses tui)

dogdns instead of dig (nicer colors, doesn't display useless information)

amp, kakoune (more alternative text editors)

ripgrep instead of grep (it's just better yo)

htop instead of top (displays stuff nicer)

gitui/lazygit instead of git cli (at least for staging, nice with file, hunk and line staging when you have ADHD)

gron + ripgrep instead of jq when searching through JSON in the shell (so much easier)

keychain instead of ssh-agent (better cli imo)

Wrote this on the train with my phone by checking https://github.com/Lillecarl/nixos/blob/master/common/defaul... for which packages I have installed myself :)