Forgive me if I'm wrong about this, but it would seem to me that the FAA NOTAM system had orders of magnitude more uptime than literally any product produced by so called "professional" "engineers" at big software companies.
More than google.com? Maybe, but it's close. Also, I'd be surprised if those behind NOTAM were all "professional engineers" since software PEs are pretty rare, relatively speaking. Especially in the US.
