Yes, date comparisons. I also do them all of the time. I never ran into one that would kill people. Whenever date computations were mission critical, they were done correctly. A perpetual calendar is not that difficult to setup and use. I always used 32-bit integers with a recent starting decade. That gave a 138 year reach. Being a Computer Science major rather than a Business Data Processing major, I never used just the last two digits for date entry or display.
I'm arguing that Y2K posed no real danger to life, just nuisance level events.
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.