Cloud cost savings from optimization isn't a saving — it's a receipt for past neglect. It measures the technical debt you let accumulate and the mess you finally cleaned. And you don't judge a house by how much dirt you swept up last week.

A "strategic partnership" with no shared platform, no shared roadmap, and no switching cost isn't interdependence — it's a logo slide. Here's how four ride-hailing champions learned that the hard way, and a builder's framework for deciding when to Build, Buy, Borrow, or walk away (Bye).