> I'm worried that all of us are waiting for something to replace C++ that can't happen.

From the early days of computing, history proves systems programming languages only get replaced when OS vendors push another language on their official tooling.

Apple is now pushing Swift and Microsoft, at very least, dumping C.

So will Mozilla push Rust as part of Firefox OS? If not, which OS vendor will pick it up?

Note this applies also to other "wannabe C++" replacements.