[ravenide]

The core idea seems to be to map shortcuts to sequences of characters. My experiences suggest that this has promise. Using normal QWERTY, I currently type 160 wpm on average at 95%+ accuracy. I can get up to 180-190 if I risk letting typos through. I noticed that I unconsciously adopted a related idea to the one suggested here: my fingers automatically type out sequences of letters that I'm used to. For example, "-tion" is a common suffix. Instead of typing t, then, i, o, n, my fingers just bang out "tion" as one fluid motion, like a piano scale.

There's a special type of keyboard called steno that takes this further. Instead of typing out individual letters, your keyboard has about 20 keys, and you use "chords" of keys to type entire syllables at a time. Experts can reach upwards of 300 wpm. Here's a demo: https://www.youtube.com/watch?v=U7AFutd9Gos. I tried to do this but it took too much time to learn.