TUIs have the constraint that they don't have a mouse (or is optional at best). This means almost all TUI programs can be entirely keyboard driven. Almost all

TUIs have the constraint that they don't have a mouse (or is optional at best). This means almost all TUI programs can be entirely keyboard driven. Almost all GUI programs fail at this, in other words, it's extremely likely that at some point, something that requires a mouse action will interrupt.