Not that this is terribly relevant to the discussion, but back in the day, I did try compiling bzflag with zig cc and then with clang, and the first executable crashed, while the second worked.

Despite being told numerous compile-time options to use by different manuals and documents and people on IRC, nothing appeared to change the outcome. It might be due to some undefined behaviour in bzflag, of course, but it made zig cc a non-starter for C.