It will replace coders with thinkers. The number of people that have ideas good or bad is large compared to the people that can implement those ideas as these bots/ai get better they will produce a lot of code. At the start it will probably increase the amount of code produced and the number of coders but with time as the ai gets better need for coders will decrease. We will need people that can think or imagine ideas rather than coders now these people might still be considered software developers but they will not be coders in strictest sense of the word.