There's just one small problem. The AI costs money, and the premise is AI is cheaper than people. If you augment your 100 engineers with AI, they'll cost what, 10% more? That's +10 percent to your cost center, and would be considered very bad. There are tons of tools that make us more productive - think about it, how many of them did we have to beg demand or leave for? You assume they care to maximize productivity, which is your first mistake.