How did JS not make it? It's the most ubiquitous programming language on earth and runs on more devices and environments than any other. JS will always be here.

Try reading the comments. Which also point out that SQL is missing, that there isn't 30 years of backwards compatibility in Python, and more.

Once the first browser ships a TypeScript implementation JS will be gone in a matter of months.

I don't think so, since TS by definition compiles to JS. Too many embedded systems rely on JS. And many programmers, like me, prefer non-strongly-typed systems and/or runtime typing rather than compile-time.