That simply won't change, because that's what node.js (and Javascript) is fundamentally about: An EventLoop, with callbacks that are used to handle events. All the promises and async/await are only sugar around callbacks, so they don't change the fundamental model.

A Go like model, with lightweight or real threads and no need for callbacks or promises will also need new synchronization mechnanisms in order to handle preemption and waiting which are currently not in scope of javascript, e.g. mutexes, condition variables, etc.