That's what I'm considering doing, since I can also easily drive to Canada, but for the model I want (14 Pro 256GB), I have to factor in that the phone costs slightly more between the higher price (after currency conversion, it would be $1,181 vs. $1,099 for the US model) and the higher 13% HST vs. my 8.75% sales tax in the US. It could also be subject to duty when returning to the US if you don't stay in Canada for more than 48 hours. And then there's the warranty issue... Swapping the screen is probably doable, but if the entire device needs replacement, I'm not sure if the US Apple Stores can get you another one with a physical SIM slot.