This would still be far better than ancient 300 baud terminals. I bet some Unix editors still have the hacks in them to speed up operation over slow connections…

Although I don't know how well contemporary eInk displays would handle partial updates. If it e.g. doesn't save much energy compared to a full-screen refresh, there might be huge difference in battery usage, as even slower typists would cause more redraw than the page flips caused by your average reader.