Backporting and maintaining patchsets is a huge portion of the work of distro maintainers, possibly more so than developing each new version. Why do you think A

Backporting and maintaining patchsets is a huge portion of the work of distro maintainers, possibly more so than developing each new version. Why do you think Arch (which very much has a "least effort for maintainers" philosophy) avoids it as much as possible while happily keeping up with the bleeding edge?