I think we do need a language like this, and that Zig/Odin/Myrddin/etc have the issue of having a syntax too different from C (Zig being the least offending; Hare is okay but perhaps a bit too minimal). This is great. Are there plans for a package manager? What's the target stdlib size?
That said, I'm not a big fan of the naming. It irrationally feels kinda hard to justify using a language called "C3" (and I also irrationally like cute names and mascots like Hare has).