Yes that happens, but I am not arguing about whether we get faster from repetition. I am saying that after a sustained practice and repetition, there exists a h

Yes that happens, but I am not arguing about whether we get faster from repetition. I am saying that after a sustained practice and repetition, there exists a hard limit. Pianists cannot play at 100000 keys/minute. I spend solid 6 hours a day on vim. Almost every day. I don't look at the keyboard or what I am typing. I don't even think about what I am typing. However, searching for 2 letters is a constant time operation and cannot be optimized away with repetition. You still need to go search for a word that starts with "ha" if you're trying to moving to a word "hackernews". THAT takes time and mental compute. This is very different from not looking at keyboard keys or your argument about a pianist. Whatever that search time is exceeds the ease of using a mouse (for me). Trust me, it is not about practice.