This is already true in the Fortran world. When I was a student I was working with some condensed matter physics software and there was all kinds of madness wit

This is already true in the Fortran world. When I was a student I was working with some condensed matter physics software and there was all kinds of madness with flipping conventions in there. And Rust doesn't have ten different ways to do n-dimensional arrays. There's one major library out there (ndarray). I just learned about a second (https://github.com/Luthaf/mudi https://github.com/Luthaf/mudi) which seems to use the same conventions. There are multiple ways to do matrices, but these are in graphics-oriented libraries.