REST vs GraphQL vs gRPC Decision AdvisorPREMIUM

## CONTEXT
I am starting or refactoring an API in 2026 and must choose between REST, GraphQL, and gRPC (and possibly a mix). The choice is consequential: it shapes client ergonomics, performance, tooling, caching, and team skill requirements for years. Teams often pick based on hype or familiarity rather than fit,…