In 2025, 68% of full-stack engineering candidates failed production tRPC assessments for senior roles, according to a blind survey of 1200+ hiring managers at FAANG, unicorn startups, and Fortune 500 companies. The gap is stark: most free tutorials teach deprecated tRPC 9 syntax, ignore v10's breaking changes to the context API and middleware system, and skip critical production concerns like observability, error handling, and horizontal scaling. Worse, they fail to address the career positioning needed to land $200k+ full-stack roles in 2026, where 45% of new job postings will require tRPC 10+ proficiency.…