In TypeScript 7, the compiler will be written in Go instead of TS. But the compiler will still produce JS code as its output and so Node.js is still relevant for running that JS code.
Or is there something else about TypeScript 7 that will make Node.js irrelevant?
Typescript 7 is not a replacement for node, it is a language spec and compiler, but Bun _could_ be the preferred choice for dev using a Javascript runtime.