I'm with you on the broader sentiment that Rust isn't making nearly as many inroads many people think.
But this example is silly. Do we say "FORTRAN is eating R" because R uses BLAS/LAPACK/whatever via gfortran? Nah. A zillion languages use LLVM.
But this example is silly. Do we say "FORTRAN is eating R" because R uses BLAS/LAPACK/whatever via gfortran? Nah. A zillion languages use LLVM.
Very few people, if any, put R against Fortran in this way, so the fact that Fortran libraries weren't rewritten in R doesn't contradict anyone's expectations.