The need for HPC specifics is definitely oversold, if not by Spack. One thing is the need for proper package management for unprivileged users if they don't us

The need for HPC specifics is definitely oversold, if not by Spack. One thing is the need for proper package management for unprivileged users if they don't use container messes, and the fact that there's so much stuff to share recipes for. It would help if there was more attention to performance engineering, even engineering generally, like having the sort of dynamic micro-architecture selection that BLAS libraries typically do, or attention to library substitution via dynamic linking (e.g. BLAS again).