> If x64 wasn't already dominant and had the same market share as ARM, would you choose x64? Why? I would pick the one which performed the best on my workload.

> If x64 wasn't already dominant and had the same market share as ARM, would you choose x64? Why? I would pick the one which performed the best on my workload. Assuming everything was equal; performance, performance per watt, software support, market share, price to performance: I would pick ARM because I think the competitive landscape is more diverse. x86 is effectively an AMD-Intel duopoly, especially with the cross-licensing agreements. It's a lot easier to start working with ARM IP, which means there should be more competitors, which should translate to better future performance improvements. Even today, we see many more companies competing in this space (Ampere, Marvell, Qualcomm, Apple to a degree), not to mention startups looking to develop their own ARM chips. [1] https://techcrunch.com/2020/04/29/arm-is-offering-early-stage-startups-free-access-to-its-chip-designs/ https://techcrunch.com/2020/04/29/arm-is-offering-early-stag...