The other good(?) news on this front is that Windows 11 only supports chips with at least AVX2, so if you are willing to cut off everyone on win10 and earlier, you can stick to that
Pretty sure it only actually currently needs SSE4, since they started compiling it with POPCNT for x86. The official system requirement is Intel 8th gen CPU, but Intel made Kaby Lake and Coffee Lake CPUs that lack AVX.