There is an important difference... PHP on shared hosting (often connecting to MySQL) most definitely did not autoscale and self-heal. Even if you had a load ba

There is an important difference... PHP on shared hosting (often connecting to MySQL) most definitely did not autoscale and self-heal. Even if you had a load balancer connecting to multiple machines, there was no automatic provisioning of more machines. Your database didn't automatically grow to handle more data and traffic.