I chuckled when I read "For example, we previously experienced interruptions in performance of our platform because of a hardware error that AWS experienced" on page 26.

I never expected one of the mishaps I dealt with while I worked there to appear in an SEC filing! If you want to learn a lot at the expense of a few gray hairs, I can highly recommend working in ops in the ticketing industry. I've spoken about some of the things it taught me at https://www.usenix.org/conference/lisa17/conference-program/...