Of course, hindsight is 2020, but being in the software industry myself at that time, I was really quite confident that there would be few interruptions. Critical code must be written properly, to be understood and maintained. So it’s generally not too difficult for those who maintain it to assess the nature. I think the only real danger was at the physical level, old processors with burned-in firmware that treat the year as 2 digits. But most of those wouldn’t be in the path of critical operations. Thanks to advanced text search capabilities, all date functions could be uncovered and then adjusted. Essentially, it’s expanding the parameters and adjusting logic that manipulates variables.

But now we have something to remember 09-09-2019. It was a day of “nein, nein.” “No, no!” :wink: