Multi-Cloud Reality Check: Why AWS and GCP Can't Be Treated the Same

Building a website on AWS and then recreating it on GCP reveals an uncomfortable truth: cloud platforms that seem architecturally similar have significant implementation differences. From CORS configuration to CloudFormation state management to endpoint attribute naming, this hands-on comparison exposes the gaps that theoretical documentation glosses over. For any developer or team considering a multi-cloud strategy, understanding these platform-specific realities is essential—copy-paste deployments won't work, and assumptions about portability can be dangerous.