Connecting workloads across AWS, Azure, and GCP is technically straightforward in the sense that connectivity options genuinely exist for all three. It's considerably harder in practice, because each platform's networking model works differently under the hood, and a design pattern that works cleanly within one platform doesn't translate directly to the others without real, deliberate adaptation.
My position: the biggest risk in multi-cloud networking isn't any single platform's connectivity option failing it's inconsistency in how security and routing get applied across platforms that each have genuinely different native models, creating gaps specifically at the seams between them that a single-platform security review will never catch, because each individual review is only ever looking at one piece of the whole picture.
Each Platform's Networking Model Is Genuinely Different, Not Just Differently Named
AWS VPCs, Azure Virtual Networks, and GCP VPC networks aren't the same concept wearing different labels they have real structural differences in how peering, routing, and access control actually work. Applying an AWS-flavored mental model directly to Azure or GCP networking design produces subtly incorrect assumptions that don't show up as an obvious error, they show up as a gap nobody notices until it's specifically tested or exploited.
