

Even if the final product is made in Canada, some of the inputs may have to come from the US, and it can take time for manufacturers on this side to take over where that’s possible.
Cans for beer and soft drinks were an issue for a while, and biting into the bottom lines of craft breweries. Canada has enough aluminum to make all those cans, sure, but not the pre-existing production lines, and tooling up takes time even for a well-understood product.
Even steel is more difficult than you might think—Canada and the US both produce steel, but steel is an alloy with different properties depending on the proportion of carbon or other additives, and some mixes were, as of this time last year, only being made on one side of the border or the other.
There are probably other similar issues, but those are a couple I’m aware of. In the long term it’ll all sort itself, but right now things are volatile, especially for small businesses needing to source peripheral inputs like packaging.
The thought of how the computer would react to me telling my cat to get down off the desk is . . . both amusing and disturbing.