It's the same with touch typing too. IME, without good muscle memory (touch or hybrid typing) of keys, consciously searching for each key is going to seriously

It's the same with touch typing too. IME, without good muscle memory (touch or hybrid typing) of keys, consciously searching for each key is going to seriously disrupt the flow and thought process behind the code being written. It may not make you a rockstar programmer, but it will definitely make coding more enjoyable. I think there was a recent HN discussion on this topic.