One thing that I always liked about tumx is that you can open multiple panes and send the same input to all the panes. Today I figured out you can do something similar with iTerm as well.
Just open multiple panes or tabs and press
i (for all panes) or
i(for all windows) and type away. Your inputs will be broadcasted to all panes/windows.
This is especially useful in cases where you have to do a lot of setup/logging in before in all terminals before you can tail logs or run commands.
For more detail open iterm and go to
Broadcast input in the menubar.