It's good for uptime, but not good for correctness. The main problem is that it is hard to differentiate expected from unexpected crashes. Something like a miss

It's good for uptime, but not good for correctness. The main problem is that it is hard to differentiate expected from unexpected crashes. Something like a missing pattern match can lead to a crash and it is very hard to know if the programmer "intended" for a crash to occur in that case or if the missing pattern is a bug. You can have processes that reboot once every few minutes running for years because people didn't realize they were bugged.