You heard "cloud computing" and thought someone else manages everything now. Not quite. If you are running Azure VMs or AWS EC2, you are still a system administrator. Microsoft and AWS just own the physical rack. The architectural differences every engineer needs to know: 1/ Networking Topology AWS attaches stateful Security Groups directly to instances. Azure separates the NIC as a standalone resource, letting you apply Network Security Groups at both the subnet and individual NIC level. More granular. More control. 2/ The Ephemeral Trap Azure VMs include a local temporary disk by default. If your VM is stopped and deallocated, that data is wiped instantly. It is for swap space and caching only. Beginners lose production data here constantly. 3/ The Enterprise Math Azure Hybrid Benefit is the cost differentiator AWS has no answer to. If your enterprise already owns on-prem Windows Server or SQL Server licenses, you port them to Azure and cut compute costs significantly. One feature alone shifts the cloud decision for most Microsoft shops. Virtual Machines give you total control. But control means responsibility. If you want the provider to handle patching, runtime updates, and auto-scaling, move up the stack to PaaS or Serverless. Understand what you are managing. That clarity is what separates engineers who just use cloud services from engineers who actually architect them. #Azure