At the very least, it "saves" your game between sessions, so you can continue where you left off. I wonder if anyone has made a book to be read this way so you can easily know where you stopped reading?
Commercial aviation is generally well known for having redundancies in place for a lot of problems they can potentially face, so I have to wonder how big the issue was that they had to shut down an entire airspace. Could have been a one-in-a-million glitch they couldn't account for. The subsequent investigation report will be an interesting read.