If Julia works better than Python, Why are we all learning Python?

Or do they want us to finish learning it before they introduce another super programming language. If you ask me, I think programming and the world of learning never ends. From one cycle to another, from one high level language to another and eventually, React.js will be outdated. The list goes on: Flutter, JavaScript, Kotlin, and the rest will all be outdated.

But machine Language will never die.