Yes, as far as I'm aware, it would be. I haven't examined every single one of them, but in the countries with which I am familiar, this has not been pursued.
If I may make the following observation in this context, Canada has been a groundbreaker in introducing group mailboxes, which it started to do about three decades ago. So, in that sense, this action by Canada Post shows a certain continuity. I'm not recommending it, but I'm saying this is an initiative or a tactic that Canada Post initiated when it had to deal with suburban sprawl a number of years ago and the mammoth expansion of postal addresses, which was really driving up costs.
I was as surprised as anybody else when I read this in the newspaper. It tugged at me emotionally, but I understood it in terms of the broad series of decisions that Canada Post has initiated over the last 30 or 40 years.