Indeed! Terminal.app is fine for very basic terminal needs but things like actually good and sensible pane splitting* and `tmux -C` integration are an absolute joy! And that's just scratching the surface!

* One that actually makes sense. In Terminal.app by default it just creates a copy of the existing pane so you can see your commands and outputs twice, each taking up half of the real estate. Seriously, who needs that for anything at all?