But when that leap minute does eventually occur, it's going to cause havoc in all the systems that don't handle it. Which, let's face it, there are going to be a lot of. Either because they were never designed for it or else the relevant code paths were never actually tested.
You could broadcast a leap minute with a decade to prepare for it and most software would still be developed, used, and die off in the 90 years in between. It's better for 15% of relevant software to have to worry about something so consequentially minor than 100%.
That didn't work so well for y2k issues. Just this month there was an article about a woman that keeps getting id'ed as being 1 year old instead of 101 years old because of a y2k fix.
