This thread literally meets the definition of self-promotion. So no, don't think the characterization is unfair.

If your programming language had a different name, then I would agree, but it doesn't. Many will assume that C3 is the next iteration of C2 and that it's outdated, despite the fact that C2 is still in development.

I asked and got Bas's[1] permission to use C3 as a name when I first started out.

[1] Bas van den Berg, the author of C2.