Hyperscalers use custom chips for internal workloads, but for public cloud workloads requiring flexibility, they use Nvidia GPUs because it's a plug-and-play, exceptionally flexible architecture. Nvidia is keeping 70-80% of the value of this industry.
Even if the industry grows to $1 trillion in sales, 30% of that is still a lot of money. The public cloud, neo-cloud, and sovereign on-premise enterprise will still prefer Nvidia.