No Dumb Questions: What is cloud computing and why is everyone doing it?

A beginner-friendly Q&A with Stack Overflow's infrastructure tech lead explaining cloud computing fundamentals. Topics covered include what the cloud actually is (someone else's computers), how containers and Docker work, what Kubernetes does, why cloud isn't necessarily cheaper but offers flexibility and scalability, the difference between CPUs and GPUs, why AI is driving a data center boom, and what Stack Overflow's own migration from physical data centers to the cloud actually involved.