AFAIK, the main contributors are all on linux (or alike) systems, so you're unlikely to see Metal support out-of-the-box. Although, with the new backend/plugin

AFAIK, the main contributors are all on linux (or alike) systems, so you're unlikely to see Metal support out-of-the-box. Although, with the new backend/plugin interface added in this release, outside contributors can it themselves if they really need it.