There are rolling distros on Linux that are remarkably stable. My current Linux distribution openSUSE Tumbleweed is one. And on macOS you already have an immuta

There are rolling distros on Linux that are remarkably stable. My current Linux distribution openSUSE Tumbleweed is one. And on macOS you already have an immutable system partition that provides a stable base to build on top of, so I fail to see the value proposition of a package manager on macOS that's deliberately slow.