Comment by opan

FWIW if you're on a machine where you're allowed to use non-default configs like oh-my-zsh, you could also just copy over your own custom config. It seems like you're implying the alternative to using oh-my-zsh is to rewrite your config from scratch every time or use the default. It doesn't quite add up to me. If you craft a config file of your liking one time, then back it up somewhere, track it with git, whatever, you can keep making use of that config across other machines. I just set up a new personal machine recently, grabbed my dotfiles, now it's the same familiar feeling as my other machine.