Privacy addresses still come from the same /64 which works a lot like a single IPv4 for home deployments. So from the privacy perspective IPv6 is like giving every home router a static IPv4 address.
Of course, there is no technical requirement to make those addresses static. It's just how they're usually assigned because it's more convenient.
Of course, there is no technical requirement to make those addresses static. It's just how they're usually assigned because it's more convenient.