It also means that any binaries built to use those instructions won't run on any non-Apple ARM64 CPUs, at least not easily. Sort of like how early-era Intel Hackintosh users had to have CPUs with SSE3 support or wait/hope for SSE2 patches.
I’m relatively sure that Accelerate does work fine on intel processors and is still the recommended means of doing heavy math. But that could just be because they knew of this eventual future. I’m not sure what Accelerate does under the hood for intel machines. But I would assume perhaps falls back to whatever intel might support.
