I know you definitely still need to use it entering by land - I was making the point that I think I had to physically show the ArriveCAN receipt back in January when driving back. At airports after that, the info was automatically linked to the passport info so you don’t need to produce the ArriveCAN receipt separately

Ah right. Sorry!
I am trying to think when I last came back from the us. It might have been December, but you reminded me that I did not have to show the ArriveCAN receipt or QR code.