No. They are turning llvm into an "optional dependency", or plugin, or call it what you want. Day to day/debug compilation will be done with their own compile

No. They are turning llvm into an "optional dependency", or plugin, or call it what you want. Day to day/debug compilation will be done with their own compiler and if you want you can cut a release with llvm to get all the optimizations when you're done, or at any time really. Zig won't ship with llvm as part of the standard download, but i imagine it will be easy to get zig+llvm working