I believe the author is lamenting the absence of RFC 2000 (const generics.) That is, users cannot define their own types which are generic over constant values.

I believe the author is lamenting the absence of RFC 2000 (const generics.) That is, users cannot define their own types which are generic over constant values. Just because language X can wrap a LAPACK/BLAS library doesn't automatically make it fit for the purpose of implementing one. Look at how the nalgebra represents an n-dimensional array of known dimensionality (through both the type system and in memory) and you will understand. Once there is, say, a uBLAS equivalent in rust that is easy to use and understand the implementation of, I will consider it worthy.