> Well, AWS is hosting a multitude of their EC2 instances - Graviton4 (Neoverse V2 cores). This implies that there are customers.

AWS has a bit of a different cost-benefit calculation though. For them, similar to Apple, ARM is a hedge against the AMD/Intel duopoly, and they can run their own services (for which they have ample money for development and testing) for far cheaper because the power efficiency of ARM systems is better than x86 - and like in the early AWS time that started off as Amazon selling off spare compute capacity, they expose to the open market what they don't need.

Sure, there's a different cost-benefit calculation. My argument was that there is an incentive to optimize for ARM64 because that translates to $$$. It's not only Amazon but Oracle and Microsoft too.