Yes you’re right, probably 99% of Y2k bugs were just typical production run problems that happen occasionally anyway. The world wasn’t in danger of ending January 2000, as some might have believed through hoaxes or misinformation. But it would have been a nightmare for a lot of companies if nothing had been done about it. Just about all of them rely on automation to some degree.
It would certainly have been a nightmare to field irate phone calls from all of the people born before 1900. That is a certainty.