There are (will be) a lot of projects like that. If you enjoy that kind of work, you might also enjoy helping us maintain GitHub - fortran-lang/fftpack: Double precision version of fftpack. We’ll add more libraries like that as we go.
You have expressed quite nicely how I feel about our goal for those projects. I simply want it to be maintained and modernized to compile without warnings etc., but not changed. Similarly, if you wanted to actually changed Elements, then it should be called differently.
(Regarding fftpack, I also want to have a separate project with some more modern / faster implementation of fft. That way we have the “classical” library (fftpack) and a new library that is possibly better, as two separate packages.)