IME most managers became managers because they preferred working with and helping organize people to creative contributions. I don’t see the need for any of these functions going away. I see productivity differences. Maybe the roles evolve.

I think the real question is how do we best harness the increased productivity? Logically speaking, if each person is 5x as productive because of AI there should be an equally greater capacity to get things done. Businesses aren’t just running out of work to do, right?

Most managers are managers because they like having power and control. I can count the number of managers I have met on less than one hand who you can tell is a manager because they like helping and organizing people.

Well you just met another. And I can count on one hand the number of peers who I've worked with who just want power.

It would be nice if that was true but in my experience the vast majority got promoted for their success one level down and just found themselves lumped with those responsibilities.