If you want the code to run 24/7, and you want engineers available to fix it, then you hire people to work off hour shifts and pay them more. You don't hire so

If you want the code to run 24/7, and you want engineers available to fix it, then you hire people to work off hour shifts and pay them more. You don't hire someone to work 9 am to 5 pm Monday to Friday and expect them to wake up at 2 am to fix something. On the other hand, an engineer scheduled to work from 9 pm to 5 am would have no issue doing so.