> AFAIU all the Graviton chips so far are using off the shelf cores licensed from Arm. What Amazon is doing is assembling a shopping list of cores, peripherals

> AFAIU all the Graviton chips so far are using off the shelf cores licensed from Arm. What Amazon is doing is assembling a shopping list of cores, peripherals (probably also to a significant extent licensed from Arm rather than a 3rd party or even in-house) etc. This is my point. Amazon using ARM lets them tap into the huge ARM ecosystem with minimal investment on their part. The cores they're using have known qualities and meet whatever performance targets they want. At this point RISC-V doesn't have that same ecosystem. It doesn't even have extant high performance cores someone can just order. Building momentum is expensive. If selling that ecosystem isn't your main business it's probably not worth investing millions or billions to develop it.