I assumed (perhaps incorrectly) that they meant non-macOS Apple hardware servers.
Also this was never intended for people using an old laptop 'as a server' anyway, of course that works, and people doing that don't need the enterprise features from a server-specific version of the OS.
Also this was never intended for people using an old laptop 'as a server' anyway, of course that works, and people doing that don't need the enterprise features from a server-specific version of the OS.