I feel like most languages could use simd in the standard library. We have all this power in the vector units of our CPUs that compilers struggle to use but yet we also don't make it easy to do manually
C# is the language that is doing this exact thing, with the next two close options being Swift and, from my understanding, Mojo.
Without easy to use SIMD abstraction, many* of .NET's CoreLib functions would have been significantly slower.
* UTF-8 validation, text encoding/decoding, conversion to/from hex bytes, copying data, zeroing, various checksum and hash functions, text/element counting, searching, advanced text search with multiple algorithms under SearchValues type used by Regex engine, etc.
