[pabs3]

You have to deal with a lot more complexity; contracts, cables, network, power, cooling, hardware purchases/failures, disk failures, RAID, routing, BGP, operating systems, databases etc. With the cloud you just outsource that to Amazon and they charge you for it.

[atmanactive]

That's ok for a rapid start. Later on, each and every company reaches a point where they are looking for a way to self-host. AWS bills tend to swell out of control.