If you have at least a /96 to dedicate for snid, then couldn't you just use that public prefix instead of 64:ff9b to encapsulate ipv4 address, making the setup

If you have at least a /96 to dedicate for snid, then couldn't you just use that public prefix instead of 64:ff9b to encapsulate ipv4 address, making the setup somewhat simpler? Also if you used public prefix then I imagine you could even run this setup over the internet, i.e. have snid run on some public server with dualstack and forward connections to ipv6-only app servers. I'm imagining the common situation where you have cgnat ipv4 + native ipv6 at home, you could host snid on public cloud instance to expose services running at home.