I think the printers and the old monitors reason are basically the same? Scanlines used to be a "you have now to set this pixel, if you missed it, you get next

I think the printers and the old monitors reason are basically the same? Scanlines used to be a "you have now to set this pixel, if you missed it, you get next scan." It is an oddly accurate mental model to think of the screen as printing an image every scan.