In marketing, an AI can effortlessly perform basic duties, write email copy, research, etc. Same goes for programming, graphic design, translation, etc.
The results will be looked over by a senior member, but it’s already clear that a role with 3 YOE or less could easily be substituted with an AI. It’ll be more disruptive than spell check, clearly, even if it doesn’t wipe it 50% of the labor market: even 10% would be hugely disruptive.