For Twitter, outages are serious business and definitely a threat to the organism. As users on the outside maybe we don't care so much, but internally Twitter

For Twitter, outages are serious business and definitely a threat to the organism. As users on the outside maybe we don't care so much, but internally Twitter has invested tremendous amounts of energy and brain power to make the service resilient and scalable over the past 12+ years. When Twitter is down, it was taken quite seriously by those who worked there. I'm sure they did the blameless postmortem culture, the whole none yards. Too much downtime and people will stop using it and / or migrate to a competitor, and then the service will be dead.