Does an AMD Chiplet Have a Core Count Limit?

When it was announced that AMD was set to give a presentation at Hot Chips on its newest Zen 3 microarchitecture, I was expecting the usual fare when a company goes through an already announced platform - a series of slides that we had seen before. In the Zen 3 presentation this was largely the case, except for one snippet of information that had not been disclosed before. This bit of info is quite important for considering AMD's growth strategy.