Additionally, iTerm2 supports splitting windows vertically and horizontally, with niceties like dimming inactive panes. However, not all terminal applications support this. When I move from my laptop to a public computer to my iPad I appreciate a consistent experience. If you don't use split windows in the first place then tmux's functionality won't thrill you, but as someone who logs into my dev machine from multiple locations I prefer to rely on the actual terminal application and host operating system as little as possible for window management.