Because it would be incorrect. Like the article's main premise. Flooring is the only correct behavior for minutes. And other time units. Big Ben may not show s

Because it would be incorrect. Like the article's main premise. Flooring is the only correct behavior for minutes. And other time units. Big Ben may not show seconds but people would notice if it started bonging 30 seconds early or late with new year. Which would be the case if it rounded. It bongs right on time. That kind of is the point. The news doesn't start half a minute early or late either. And people joining meetings after the minute changes in their clock are technically a few seconds late.