Comment by spyckie2

While predictive techniques can help, you really want something that is accurate 100% of the time so you don't have to keep an eye on your output. I'd rather memorize two different chords to get 100% correctness on the I or eye problem rather than 99% correctness on it with a predictive engine - the fact that you have to keep track of what you're typing to catch its mistakes really makes predictive techniques not so good for speed.