More and more often, IPv4 addresses incur additional costs, or discounts are offered if you only select IPv6 addresses. That's why I suggest the following feature:
A new role for servers: IPv6-to-IPv4 proxy. Connections via IPv6 go directly to the web servers, while all requests via IPv4 are routed through a proxy, which then forwards the requests accordingly. This allows multiple servers to be operated via a single IPv4 address.
