i think canada has found that its been less difficult than we thought it would be
ultimately the US is buying stuff, but its the stuff thats actually valuable and not the USD you get from it. its even easier to move when you cant even buy oil from the gulf anymore, whether in USD or otherwise.
the supply chain problem arrived in trump 1's covid disaster, and hasnt exactly been solved for getting stuff to the US again
I was very impressed at the pace at which Canadians got behind the move away from US goods. Turns out threatening to annex a country and NOT having those making the threats get punished/thrown out does that. It shows a significant enough part of the US would support the move. That portion might only be 10-30% (who knows exactly) but it is enough that it cannot be ignored and it will keep coming back.
There are still more fundamental materials markets that will take years/decades to move away from but that is already happening.