Production was close to maximum anyway because of existing demand and how expensive new fabs are to bring up. The boom in AI use wasn't sufficiently planned for as it wasn't expected at the scale we are seeing, so to scale up means building more fabs - a long and expensive task. The situation is not helped by one of the AI companies successfully negotiating huge deals for a year worth of production with the two biggest providers at the same time and keeping it secret enough that neither bumped up prices in the deal as a result of knowing what the play was.