Why it matters
Viewers follow the cursor, not the page
In a demo, the cursor is the narrator. When it's tiny, shaky and teleports between buttons, viewers lose track of what happened. Most recorders capture the system cursor straight into the video, so the only fix is to re-record with a steadier hand.
Screenix keeps the cursor out of the picture until the end. Because it's drawn at render time, you can make it bigger for small screens, smoother for fast movements, or hide it while it rests, without recording again.