I mean, say, you want a really nice camera, or a drone, or maybe a gaming laptop, and since those things are made in China, they are too expensive to buy right now in the US, since tariffs are over 100%. So you just go to Canada, buy the thing, unpack it from the packaging, and pretend like its just personal items. Just like a smartphone.
AFIAK, border agents usually don’t ask if you bought your phone in the US or from outside, they shouldn’t ask about other personal electronics, right?
If it’s under a certain dollar amount and not to be sold, sure, but this is probably not going to practical for a lot of things unless you’re pretty close to the border.
“Oh yes, officer! This is my washer and dryer from home… I just felt like they needed a bit of fresh air!”