> They never heard of making a UI, and just slapped buttons. I suspect that floor numbering predates lifts (elevators) by centuries. Stairs are ancient. I me

> They never heard of making a UI, and just slapped buttons. I suspect that floor numbering predates lifts (elevators) by centuries. Stairs are ancient. I mean, zero itself is a non-obvious concept. Its invention is a matter of historical record: https://www.open.ac.uk/blogs/MathEd/index.php/2022/08/25/the-men-who-invented-zero/ https://www.open.ac.uk/blogs/MathEd/index.php/2022/08/25/the... ... and we still use counting systems which predate the invention of zero, such as Roman numerals.