Many years ago at one point in 1974 I started a shop from scratch for a company with 24-hour operations. In those days of CRT terminals I had 5 Teamsters union operators, chosen by seniority, working staggered shifts, and when anything went wrong I had to get up and commute about 15 miles to handle problems. There were no remote connections, so if a problem couldn't be handled by talking to non-technical union employees, I had to go.
Yes, those hours were predictable. That's how you learn that software quality really does count.
I fondly remember my third-shift guy who would read to me line-by-line from the CRT console:
"It says to me", (reads a line)
I tell him what to type in.
"And then it says to me", (reads another line)
I tell him what to type in next.
Rest In Peace, Marvin. We made it happen.
One of the best days of my IT career was they day I told my boss if the problem was so simple he should go fix it himself.