I don't use text-to-speech because the physical act of typing on a keyboard itself is integrated into my thought process. Possibly because waiting on my fingers to input text helps me pace and organize my thoughts. Sounds kind of weird but I can almost feel the quality of writing via the physical tactile experience of using a keyboard. When I'm not confident or clear in my thought process there is a slight hesitation inputing text. When I know exactly what I want to say it's an effortless flurry of keystrokes that feels right.