90% of Nvidia's revenue is from datacenters.
If the datacenters stop buying Nvidia's products, and use their own hardware instead, then Nvidia loses 90% of its revenue.
These 90% will be a flash in the pan, same way the COVID revenue was for mask sellers. Sure it feels bad from Nvidia's perspective, but we also can understand that the AI boom would not have kept Nvidia skyrocketing infinitely anyway.