@johnpoz
I really don't know why some companies do certain things and sometimes I wonder if they do. However, as I said, Rogers is not alone in this, but it is a good idea. I recall people I know complaining how their ADSL address would change, right in the middle of them doing something. I get the impression some ISPs are nasty.
I discovered this feature at least 15 years ago. Of course, when I change hardware, I have to update the DNS alias. I'm not certain what will happen with my IPv6 host names, as I haven't changed any hardware in the 4 years I've been getting IPv6 from my ISP. I'm assuming the DUID will keep the prefix from changing.