> What _is_ interesting is that I get the impression that Carbon is being workshopped with the C++ community, rather than the wider PLT community -- I worry that they won't benefit from the broader perspectives that'll help it avoid well-known warts elsewhere.

FWIW, we're working hard whenever looking at an aspect of the language to look at other languages beyond C++ and learn any and everything we can from them. Lots of our design proposals cite Swift, Rust, Go, TypeScript, Python, Kotlin, C#, Java, and even Scala.