[EdiX]

It wouldn't be very useful without NLS. It wasn't intended for text entry but to select commands to execute while the mouse selected the target for the commands, ie you would enter DW for "delete word" with the chorded keyboard and use the mouse to select the word to delete.

It disappeared because the people a Xerox Labs decided it was too hard for normal people to learn to interact with a computer in this way, so they replaced the chorded keyboard with on-screen buttons plus a set of keys on the left of the keyboard for the most used operations (Undo, Open, Copy, Paste, etc). Then Apple, to make things even friendlier, removed the extra buttons from the keyboard entirely and relegated the most frequently used operations to key combinations (Cmd-C, Cmd-X, Cmd-V, etc). You will notice that many shortcuts are relegated to the left side of the keyboard.