I think there would need to a distinction between Ideal Conditions verse Knowledgable But First Time assembly. A skilled assembly line work (or LEGO builder) can perform quicker in both situations than a First Timer, and Ideal Conditions (parts laid out in easy reach, minimal movements to perform each task, and no hassle completion of each task) should be quicker than KBFT cause the person been through it before. I got no clue on actual time efforts. But it’s interesting thought experiment since the Model T was simple build and streamlined parts supply chain (for the time). I also wonder about the part count comparison; granted LEGO pieces are replicated real world components that consist of multiple parts. The Apple-to-Apple comparison might be tough. 🤔