I am an introvert, like a lot of coders, and having to give a presentation in front of a live audience, and in addition, writing code (or doing demo) at the same time, is a LOT of pressure. It's hard enough to try to remember what I need to say, and my mind would sometimes go blank, sometimes trying to remember what I did wrong when there's unexpected error or forgetting a function name or parameters, etc.
It might also useful for for screencast recording / Youtube tutorial. Bisqwit has his own tool, running on DOS, that does something similar, which mimics him typing code on the editor. (https://www.youtube.com/watch?v=5Da6ZyQJjE0)
I really like bisqwit presentations and videos, often mindblowing. However i really dont see the point of scripting typing code. For command-line like here sure why not. But for code there is no point. If I'd much rather see blocks of code copy pasted and explained orally or just going through existing code - maybe several versions more and more complex - with someone explaining it. I don't see the value of some c++ code being typed very fast and accelerated.
It might also useful for for screencast recording / Youtube tutorial. Bisqwit has his own tool, running on DOS, that does something similar, which mimics him typing code on the editor. (https://www.youtube.com/watch?v=5Da6ZyQJjE0)