My point was that it probably doesn’t matter. M1 is already very fast, even without SVE. At some point you just have to decide to ship a product, even if it doesn’t have every possible feature.

Like other posters mentioned, for vector operations like this, you could be dynamically linking to a library that handles this for you in the best way for the hardware. Then when new instructions become available, you don't have to change any of your code to take advantage.