A few questions from where I stand today:

Is complete automation of ATS a real alternative today or in the near future? Can current systems replace human operators in every aspect? What about factors such as local knowledge, social intelligence, adaptivity etc.?

Can a computer fully understand voice communications with different types of dialects, pronounciations, small speech impediments etc. like a trained ATC?

Can a computer e.g. tell when a pilot for some reason is nervous and try to adapt itself accordingly to the situation?

Remember that interaction between ATS and aircrews is about more than mere exchanges of information in a clear tongue.