It exists. E.g. on macOS it’d actually use the AMX matrix multiplication units (for benchmarks that use BLAS) and blow away most x86_64 CPUs that have to rely on AVX2.
I found the data compelling--M2 silicon under Linux is generally competitive against contemporary strong x86 laptops, but if you are sensitive about the performance of a particular workload, choose your device carefully.
Fun to think that Apple almost has a monopoly on RISC technical workstations…