The amount of servers used by almost any project is growing rapidly mostly due to increasing adoption of cloud technologies. As a result, traditional ways of managing IT infrastructure become less and less relevant.
The manual approach fits well for a farm of a dozen, perhaps even a couple of dozen of servers. But when we're talking about hundreds of them, doing anything by hand is definitely not going to play out well.
It's not only about servers, of course. Every cloud provider gives extra services on top, be it a virtual networking service, object storage, or a monitoring solution, which you don't need to maintain yourself. These services function that a Software as a Service (SaaS