Computer Snafus Continue to Plague Airlines

I just have to say something. Redundancy??!! Or how about upgrade??!! Maybe security??!! I just don't understand these glitches in our day. If airlines would modernize their IT systems, properly protect/update them, and provide a failover computer system and paper system, these would be non-issues. But I'm lost as to why the message doesn't get through. They will continue to lose money with these kinds of events occurring.