@danadams -- your new IP-address is just an IP-address. If Shaw "splits" a neighbourhood subnet into two subnets, to relieve congestion and increase performance, Shaw would give you (and your neighbours) a new IP-address. So, while it can be "stable" for a long time, it is not "permanent", even if you were a business with a need for a "static" IP-address.
Now that COVID-19 has forced employees to work-from-home, having a "static" IP-address has become more important to some Shaw Business customers, to allow their workers to remotely connect to that IP-address.
It's actually pretty amazing that your issue has not been noticed to have happened more often, but, the contributors to this forum are a tiny subset of all of Shaw customers. Most Shaw customers do not post anything here.