The ROI I've seen—or the multiplier effect, as some call it—is 3:1 in the current state of the industrial sector in Canada, which could rise up to 6:1 if the majority of inputs were to be sourced from Canada. That would be considerable at 6:1, and that's based on external estimates when it comes to EVs and batteries.
On June 14th, 2023. See this statement in context.