Consoles used to all be custom architectures. If Intel was the only one doing x86 and AMD had offered the same price, performance and features as they do now, but in another architecture, my bet is that in that universe AMD would still have gotten the contract. Using x86 is a big deal to simplify things, but so is AMD's APU with unified memory between CPU and GPU (similar to what Apple now does with their silicon)

Every single video game console of the last generation (and probably further back) are using AMD Radeon for graphics too FWIW. I think the Switch might be the only outlier recently using nvidia graphics.

AMD invented x86_64