Yes, but Linux is only the kernel, everything else is someone else project. A distribution is nothing else than a curated list of software projects. macOS is a

Yes, but Linux is only the kernel, everything else is someone else project. A distribution is nothing else than a curated list of software projects. macOS is a good example of what you're proposing. The developer toolkit have a lot of nice frameworks (libraries) to help build apps. But that ties you to Apple. You can't expect consistencies across OS unless someone does the work to provide an intermediate layer, and then you loose on each OS nicest capabilities. It may not make business sense, but the most elegant solution is to have a core that is your feature set, and then flesh out each dependency according to the platform.