Other than the original reference implementation, you would not find any other fortran version of BLAS anymore. And nobody links to the reference for performanc

Other than the original reference implementation, you would not find any other fortran version of BLAS anymore. And nobody links to the reference for performance code. All written in either close to metal C with SIMD etc. or straight in assembly altogether. LAPACK is mostly fortran but there are also libraries slowly rewriting those in Rust/Julia and C.