I do wonder if there might be a business opportunity in doing this. On a specific model, I bet you could get the rework time down to 5 mins per machine in bulk

I do wonder if there might be a business opportunity in doing this. On a specific model, I bet you could get the rework time down to 5 mins per machine in bulk. And 5 minutes of technician time + the cost of 4 ram chips is much less than the price difference between the 8 and 16G machines. Obviously to maximize profits, you probably want to change a 4G model to be a fully specced 32G model.