[adrian_b]

NEON is an obsolete and inappropriate name, but I think that what you mean is that among the 64-bit Arm CPUs, all those that support SVE (which includes the CPUs of all recent so-called "gaming smartphones") also support the original Aarch64 floating-point instruction set, which is available in all 64-bit Arm CPUs that have been used in mobile phones, tablets or laptops.

[dundarious]

The "and not Neon" was a bit of an unnecessary pre-condition I shouldn't have added. However, given the OP discusses "there were a surprising number of users without AVX2 capable CPUs", I think there would be an un-surprising number of users (for this type of library) without SVE. SVE feels analogous to some of AVX-512 at present -- maybe not that bad.

[adrian_b]

Indeed, while the SVE support is reasonably widespread because it is included in all the higher-priced Android smartphones launched during the last 4 years and a half, some very cheap smartphones with Cortex-A78, without SVE support, are still being sold.

[dundarious]

That's the Switch 2's chip, isn't it? Meaning missing SVE there too. Casual search leads me to believe Steam Frame will also not include it (Snapdragon 8 Gen 3, but added in Elite Gen 5). Another generation, perhaps.