We should start adding high level modern Fortran linalg to stdlib and by default use the Fortran reference lapack: Maintain fpm installable lapack under fortran-lang?
Both stdlib and lapack provide high performing default reference implementation. And then vendors are free to substitute by even higher performing versions (MKL, OpenBlas; and the same for stdlib down the road).
Once stdlib has linalg via Lapack, I think I would use it too in new projects, almost by default, as linear algebra is almost always needed in any numerical code.