Very inspiring, but take into account that John (most likely) lives in a good enviroment to proceed with this, his job is intellectually demanding but he is not

Very inspiring, but take into account that John (most likely) lives in a good enviroment to proceed with this, his job is intellectually demanding but he is not overworked or extramulti-tasked. If your job leaves you depleted, and when you arrive home you're like a husk of a human being you can't expect to do something like this. Take into account that great developers like John live in a place where they can grow, you can't copy what they do and expect to have the same great results in a not so great environment.