I'm not sure how cloud/saas made the CTO behavior and its consequences any better. At least on-prem if they picked the "wrong" DB / message bus / etc, you could quietly replicate to another stack internally as needed for your analytics needs.

If your data is lodged in some SaaS product in AWS, good luck replicating that to GCP, Azure, or heaven forbid on-prem, without extortion level costs.