The third lesson is that the details matter. Some of the provisions that are currently being ignored by commenters on NAFTA are buried deep in the texts and schedules. These may turn out to be deeply consequential for NAFTA parties. Some may also affect outside parties. As an example, the auto rules of origin require a significant and growing share of autos, trucks, parts, components, steel and aluminum to be made within NAFTA (with more expensive labor inputs as well). For suppliers based outside of NAFTA, this is going to be extremely problematic or even catastrophic. These orders could be cancelled outright and never replaced. Alternatively, NAFTA 2.0 could force a renewed look at offshoring or sourcing entirely for export. Either way, existing supply chains are likely to be under severe stress.
The fourth lesson is that NAFTA contains some problematic provisions that might spread elsewhere.