A lot of networks were designed with ipv4 and NAT in mind. There really isn’t a cost benefit to migrate all your DHCP scopes, VLANs, Subnets, and firewall rules to IPv6 and then also migrate 1000’s of endpoints to it.
Much cheaper to just disable ipv6 entirely on the internal network (to prevent attacks using a rogue dhcpv6 server etc) and only use ipv6 on your WAN connections if you have to use it.
The use case is people who want pocketable, one handed phones. It doesn’t matter to me if they make another iPhone mini or an iPhone flip. Whichever one they release will be my next phone.
The last iPhone mini release was in 2021. I don’t want a near 7” pro max phone. 6.4” is too big in my opinion as well.