Automakers have argued that clear, long-term regulatory timelines let them plan multi-billion-dollar factory retooling and supply chain investments with more confidence than shifting or ambiguous rules would allow. A shifting or unpredictable regulatory timeline, by contrast, can leave automakers hesitant to commit billions to new battery plants or supply chains they aren't confident will pay off. Advocates argue this predictability effect is why many automakers themselves have supported clear regulatory timelines. They see uncertainty, not the mandates themselves, as the bigger risk to industry planning. They see regulatory certainty, not the mandates themselves, as the bigger industry concern.