x86-64 (especially AMD processors) still dominate if you want to get as much bang for your bucks as possible, due to, among other things, a higher number of instructions per clock and a better support for SIMD instructions: wider registers and better adoption in software.

compared to ARM64 CPUs because they provide 1 core = 1 vCPU. This may explains why AWS graviton instances can win some benchmarks against AMD instances for an equal number of vCPUs despite the fact that AMD CPUs smoke server-grade ARM CPUs.